You want to share a screen recording or a clip, but not the conversation happening behind it. Removing the sound takes a few seconds.
Turning the volume down in a player only affects that player. Whoever you send the file to can turn the sound straight back on. Removing the sound track means it is not in the file at all.
Because only the sound track is left out and the picture is copied across as it is, this is fast even for a long video, and the picture is exactly as good as before.
The new file stays in the same format as the original, so an MP4 comes back as an MP4.
No. The picture is copied without being encoded again.
Not from the new file. Your original still has it.
No.