Video acceleration without increasing the size?

This:
iMac, iMovie, screen recording (10 hours (4GB))

Task:
to speed up the video 4 times without loss of quality, so it is not weighed 100GB

Note:
iMovie use does not matter. if this problem can be solved in another program - tell me what
March 16th 20 at 00:06
1 answer
March 16th 20 at 00:08
Solution
I would recommend to put (and in the future to study) https://evermeet.cx/ffmpeg/
For the current task is something like this solution: https://trac.ffmpeg.org/wiki/How%20to%20speed%20up...

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