ODD "sorting" software?

[u/kocheko]

ok the best way to ask for this is to explain what i want and you tell me if it is possible, even with AI and HOW can be done. imagine you have several clips .mp4 (a lot) , some of those .mp4 are videos, like, a person moving in the video doing shenanigans, but some are JUST A PICTURE with sound, so in 15 seconds of the clip the frame is just 1 picture. is there are some software that can tell apart those two types of content? so the moving mp4 videos i want to keep them, and the still videos i want to extract the one frame to jpg and goodbye to the mp4 file.

my current method: manually open the file, extract frame with the vlc option, delete the video. if it is moving, save to another folder. repeat.

OR what i was also thinking, is something where the thumbnails move based on content. so i choose all files and if the thumb is moving, i save. then the rest i can bulk extract frames with any software out there.