Missing mp4 thumbnails in nemo?

some thumbnails are missing in nemo, the size for thumbnails is set to 64 gb, the curious thing is it fails to generate some SMALLER thumbnails, for example, i have one file thats around 100 mb, has a thumbnails, next to it one with 80, no thumbnail, i tried some common tricks like deleting totem.thumbnailer but nothing seems to work. Any help would be appreciated!

the system in question is running endeavouros with cinnamon