Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsMultistreaming—also called simulcasting—means broadcasting the same live production to more than one platform at the same time. You can send separate outputs from your computer or send one feed to a cloud relay that distributes it. The right choice depends on your computer, upload capacity, desired control, and the platforms you want to reach.
What you need before you multistream
Start by confirming that every destination account can go live and that your chosen workflow supports it. Encoders and relays may ask for a platform’s RTMP server URL and stream key. Treat stream keys as credentials: do not share or publish them.
- YouTube: The channel must be verified and live streaming enabled. First-time activation can take at least 24 hours, according to YouTube Help.
- Other destinations: Make sure each account is active and in good standing, and check its current live-streaming and simulcasting rules.
- Production: Decide what you will send—such as a documentary discussion, interview, or live event—and check that its audio, framing, and rights are appropriate for every destination.
Choose a multistreaming method
| Factor | Local encoder with multiple outputs | Cloud relay |
|---|---|---|
| How it works | Your computer or device encodes and sends outputs to destinations. | You send one feed to a service, which distributes it to selected destinations. |
| Computer resources | Can require more local processing, particularly if encoding is repeated; suits capable hardware and users who want control. | YouTube describes this approach as lighter on the device and potentially simpler, especially for more than two channels. |
| Upload capacity | Independent outputs can increase the total bitrate your connection must upload. | Your connection sends one feed to the relay; the relay sends it onward. |
| Cost and limits | Depend on the encoder and setup; there is no universal price. | Subscriptions are common, and free plans can have different limits. Check the service’s current terms. |
These distinctions are described in YouTube Help’s guidance on streaming across platforms. A relay can reduce the load on your computer and outgoing connection, but it adds a service between your encoder and the destinations.
Calculate the upload speed you need
For separate outputs from a local encoder, add the target bitrate of every feed. YouTube’s example is 6 Mbps plus 4 Mbps, for a combined target of 10 Mbps. YouTube recommends upload speed 1.5–2 times that sum, which makes the example target 15–20 Mbps.
Recommended Free Tools
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
- Write down the target bitrate for each output.
- Add the bitrates to get the combined upload target.
- Multiply the sum by 1.5–2 for the recommended upload-speed headroom.
- Test the connection under conditions similar to the broadcast, including expected motion and audio.
For a cloud relay, your connection sends one feed to the relay rather than a separate feed to each destination. The relay’s distribution does not remove the need for a stable connection from your encoder to the service. While live, monitor the stream-health indicators available at the destinations.
How to multistream with OBS through Restream
Restream’s documented workflow uses its service as a relay between OBS and selected destinations. The exact interface and supported destinations can change, so check Restream’s current OBS setup guide and the terms for your plan.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
- Connect destinations: In Restream, connect the Twitch and YouTube accounts you want to use as channels.
- Create an encoder stream: Create a stream using the Encoder | RTMP option.
- Select destinations: Turn on the connected channels that should receive this broadcast.
- Copy the relay credentials: Copy the Restream stream key shown for the encoder workflow.
- Configure OBS: In OBS, set the service/server and key to send the stream to Restream. Alternatively, use OBS’s account connection option where available.
- Start and verify: Start streaming from OBS. Check that each selected destination receives video and audio, and monitor YouTube’s stream health while live.
Restream also documents a browser-based Studio workflow. It is a separate option if you do not want to produce the broadcast in OBS; follow the current vendor instructions for that setup.
Stream on Twitch and YouTube at the same time: rules to check
Twitch’s simulcasting guidance applies unless an agreement with Twitch requires exclusivity. Twitch says the experience on Twitch must not be worse than the experience on other services, and you must not use Twitch to direct viewers to another service’s live stream. Review the current Twitch terms and simulcasting guidance and any individual agreement before you go live; requirements can change.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Policies are destination-specific. A setup that technically sends a feed to several services does not establish that the content or promotion is permitted on all of them. Check each destination’s current rules, especially if you have an exclusivity agreement or are using material whose rights may be limited by platform, territory, or format.
Quality, transcoding, and destination checks
Do not assume viewers on every platform will receive a choice of video quality. OBS’s documentation says transcoding availability depends on the platform and account tier. Its guidance, dated 2021-06-09, says Twitch access is tiered and YouTube transcodes all streams; because those account and platform details may change, confirm them in current platform documentation before relying on a particular viewer quality option.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
- Check the video framing and audio at each destination, not only in your OBS preview.
- Use each platform’s stream-health indicators during the broadcast.
- Confirm the selected destinations are actually receiving the stream after you start.
- If quality is uneven, identify whether the issue is your encoder, upload connection, relay, or a destination’s processing before changing multiple settings at once.
Troubleshooting common multistream problems
| Symptom | Likely cause | What to check |
|---|---|---|
| YouTube will not accept a live stream | Live streaming is not enabled or the channel is not verified. | Confirm channel eligibility and enablement in YouTube. First-time activation can take at least 24 hours. |
| One or more platforms do not receive the broadcast | A destination was not selected, account connection failed, or the workflow has incorrect stream credentials. | Check connected accounts and enabled destinations in the relay, then confirm the server/key configuration in OBS. |
| Video or audio becomes unstable on several direct outputs | The combined bitrate may be too close to available upload capacity. | Add the output bitrates, apply YouTube’s 1.5–2× headroom recommendation, and retest with representative motion and audio. |
| Only one destination reports poor health | The problem may be destination-specific rather than a general encoder or connection failure. | Compare the stream-health indicators at each destination and inspect its account, ingest, and policy status. |
| Viewers cannot select a lower or higher quality | Transcoding options vary by platform and may depend on account tier. | Check current platform documentation; do not assume the OBS documentation’s 2021 account-specific details remain current. |
Or let it run in the cloud
For documentary channels that need uploaded videos to keep a YouTube stream live around the clock, StreamNeo is a separate option from multistreaming a live production: upload a recording or build a playlist, add your YouTube stream key once, and go live. It loops uploaded videos from the cloud, so no computer, OBS, or home connection has to stay on. It streams to YouTube only and does not broadcast from a camera.
Each slot includes one always-on stream, 10 GB storage pooled across active slots, looping and playlists, automatic recovery if YouTube drops the stream, and support from the StreamNeo team. The same product is on every plan; only the billing length changes. Uploads stream as made, up to 4K 60fps, with no re-encode or quality tiers. The first day is free with no card, once per account. Monthly is $9.99 per month.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Learn more at StreamNeo, or start your free first day.
More planning resources
For a multistream setup, an Ethernet cable can be a modest troubleshooting step if Wi-Fi consistency is a concern; it cannot increase the upload capacity of your internet plan. For a YouTube channel built around continuous uploaded programming, StreamNeo also offers a upload-time calculator, a cloud vs PC cost calculator, and a copyright safety checklist.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
