When editing video you have video and audio are separate, there is a so-called out of sync? Are you trying to move the track, but it does not work?
I'll tell you how to solve this problem.
For solutions we need one program. It is called «HandBrake». Using this program, you need to change only one setting and will not be out of sync. In the video I showed you how to remove the de-synchronization.
Link to the official website of the program: https://handbrake.fr/
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