We do not recommend changing Windows network settings, as this could mess up things even more.
As this issue only effects a very small number of YouTube streamers and not any other streaming providers, a change on the computer side of things is unlikely to help.

One test you can try is to ping a.rtmp.youtube.com from the command line:



One theory is it relates to specific servers in specific locations, as a.rtmp.youtube.com automatically routes to what it thinks is the nearest server using a process called "Anycast".
If the ping times are quite high (>100ms) then it indicates YouTube is not picking the best server for your location.

We have been broadcasting 10 hockey games a day on the same network via Blackmagic Web Presenter for 9 days. But when I try to stream via Vmix, it doesn't take more than 2 minutes for me to go to yellow. I don't think the problem is with YouTube. I think the problem is related to Windows.

Hi,

things are complex, so lets try to break it down:

1. You need a stable network connection. Fiber or copper DSL is best, WiFi is a no-go and mobile networks can be tricky.
   
2. Make sure you stream with constant bitrate (CBR) activated. If you don't, traffic shaping in the providers backbone can do all strange things. Cutting video from Powerpoint still slide to a moving crowd will most certainly create a hiccup in the upstream. Bitrate will rise, traffic shaping does not keep up and vMix can not transmit its video buffeers, you get the dreaded orange flashing.
   
3. RTMP is no good, even if YT and lots of others support only this. RTMP is 20 years old, runs on TCP and is brittle in mobile networks, unstable networks and across continents. It gets worse with higher bitrates as well. The reaseons are complex, but unfortunately the problem is there. (Read this for details.
   
4. In short: Use RTMP only up to 6-8 Mbit/s, use it on the same continent, use it on stable networks. Do intensive tests.
   
5. On mobile networks, use SRT to get into the "real" Internet. You can set up a instance of DataRhei Restreamer on a VPS and go from there via RTMP to YT or other ingest points.
   
6. Bandwidth tests are not enough. They help to set your bitrate - do not use more than 75% of what the speed test gives you. The other killer are jitter and packet loss. Try this website with Chrome/Edge and the proper parameters to get an idea how good your uplink is.
   
7. If you stream to a Wowza server, make sure all the buffer parameters for ingest are set up correctly.
   

On mobile networks:

1. Use 5G if you can.
   
2. Measure the available bandwith and adapt your upstream bandwidth accordingly.
   
3. Use HEVC instead of H.264, if possible. Same quality, less bandwidth.
   
4. Use SRT. Use SRT. Use SRT. :-)
   
5. If you use bonding technology, understand how it works and do extensive tests. Use SRT.
   

Sorry that this is not easier, but hopefully these points may help you a bit.

Good luck and let us know how is goes.

Christian