Hi @Peter_1985 ,
In Teams meeting, I cannot properly show/share the video (playing it via the browser) to others.
Do you mean the video is played via the browser on your computer and you would like to share it with the others in Teams meeting? If this is the case, generally we can refer to the instructions in the article below, share the video by clicking the "Share Content" option and choose "Include computer sound":
Share content in a meeting in Teams
If this doesn't apply to what you are experiencing, feel free to post back with more details about the issue for further discussion.
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