1. Determine the size of the video recording according to the resolution of the ui.
For example: ui size is 640 360,
then the size of the recorded video is: 640 360
format: MP4
size: 640*360
frame rate: 30 frames per second
size: less than 4M
2. Tools for compressing video:
Quick Video Converter
3. Some of the sizes are too large, and there may be problems during playback, such as stuck in a certain frame. At this time, the above factors, resolution, size, should be excluded. Bit rate, frame rate.