I've been using QuickTime to record my online classes, unfortunately the video sizes are very large (about 2.5GB for a 2hr long video). I tried recording the same classes using Zoom and the the file was around 500mb (almost 4 times lesser), and the quality was almost the same. I have tried:
Using VLC to compress it, but for some reason the 2hr long file is reduced to just 5 seconds (the quality remains the same though).
Exporting it to a lower resolution using Quick time, but the quality became very poor and the audio was muffled.
I record all my new videos using Zoom now, but I need my old files also and they're simply taking up too much of space.