Video formats you can play on Microsoft 365 - Microsoft Support
https://support.microsoft.com/en-us/office/video-formats-you-can-play-on-microsoft-365-07c008b2-70e4-4ced-8a9b-f25bed77196a
WEBThe following audio/video files can be played directly from your Microsoft 365 in most browsers: 3G2, 3GP, 3GPP, ASF, AVI, M2TS, M4A, M4V, MKV, MOV, MP3, MP4, MP4V, MTS, TS, WAV, WEBM, WMA, WMV. Tips: For the best video playback experience, we recommend the following video encoding settings: Container - MP4.
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