MP4 video editor recommendations ?

Mattax said
2. Side by side comparison or the runs or portions of the runs.
Click to expand...
Like this but with video.
upload_2021-7-12_13-4-5.png

That way can I can compare what I did through specific portions of the course.
upload_2021-7-12_13-18-30.png

Run 3 -------------------------------------------------------Run 5
upload_2021-7-12_13-12-48.png ---------------------------------- upload_2021-7-12_13-13-25.png

upload_2021-7-12_13-15-20.png upload_2021-7-12_13-17-49.png