Hi there, it sounds more like you’re running into issues described in this topic.
@hidde replied the following there:
Simpler loads the uncompressed frames into RAM. The video size on your hard drive is the compressed size, so it’s expected that loading the file in Simpler requires much more RAM than what you’d expect when looking at the original file.
You can do some napkin math to roughly figure out how much RAM you need for a given file. You can multiply the resolution by 32 bits (RGBA) to know the size of each frame: 3840 x 2160 x 32 = 265420800 bits = 33 MB per frame. 33 MB * 24 fps = 792 MB per second. 792MB * 120 seconds = 95 GB of RAM.
If you’re on macOS, you can consider converting the file to HAP which streams the video rather than preloading all frames in RAM. This is generally recommended if you try to load large/long video files in Simpler, since the RAM option is mostly intended for small and short video fragments.
Most of this is also described in the Video Simpler section of the manual.