[arein2]

Every time you do a screen recordin with quicktime, encode it to h264 to save a LOT of space and make it playable on any device.

To do that use Handbrake, whick is open source and the go-to app for any encoding.

[Sirened]

ffmpeg -i <original> -o out.mp4 also a super easy way to do this too since it'll get re-encoded. I don't know why screen recordings aren't handled this way automatically