All tasks/Photos & video

Try VLC first

Open a video your phone won’t play

A local MKV or another less-familiar format may need a different player.

Start with VLCFreeExplore VLC

Do this

1
Import the video into VLC from Files or a supported transfer option.
2
Open the video and check picture, sound, and subtitles.
3
If playback fails, check the actual codecs and file integrity.