Microsoft Teams may sometimes fail to play videos.
This is actually a major problem, especially for students.
Lets see what you could do if Teams fails to play videos.
Also, have a go at play the respective video on a different machine.
Download and load the Mobile app and test whether you notice any difference.
Maybe this is a local machine problem.
A number of users managed to solve this problem by changing the video URL.
So, if the URL showswww.microsoftstream.com, change it toweb.microsoftstream.com.
peek if you’re free to play the video now.
Launch Chrome or Edge and jump in tohttps://web.microsoftstream.com/.
verify if you could play the video.
Disconnect other devices using the connection to free up more bandwidth for Teams.
Let us know which method worked for you.