T_me_ofstuff_67.mp4

Directly opening or playing .mp4 files from external messaging links (like t.me ) isn't possible through this interface. However, you can view it by following these steps: How to access the video

Do you have the installed, or are you trying to view this in a web browser ? t_me_ofstuff_67.mp4

If you don't have the app, most public channels allow you to "Preview channel" to see the content. Directly opening or playing