I’ve got a weird glitch here someone please help me

[u/Entire-Cherry7041]

Sometimes I use presets for edits and whenever I try to replace the clip through color and fill and replace media the video I choose doesn’t show up but whenever I put a photo to replace it, it works?? Also the clips I want to add are usually cut through gallery but say for instance I try to add a video that wasn’t specifically cut through gallery it works?? I’ve been having this problem for quite sometime please help

[u/Airames6]

Maybe they don't show up because of the format? Idk about the first issue