Here are the steps you should take if you’re unable to upload a video in a Teams channel:

1. Check your file size: Make sure the video you’re trying to upload is not too large.


2. Check your file format: Make sure your video is in the proper format (AVI, WMV, MPEG, etc).


3. Check your network: Make sure you have a reliable network connection.


4. Check your Teams permissions: Make sure that your account has the appropriate permissions to upload videos.


5. Restart your computer: If all else fails, try restarting your computer.