Airdrop shared files are faded and can't open

Hello dears,

I'm new here. I recently have an issue with opening some files shared via airdrop from my mobile. I shared some of the videos from my mobile to my M1 via airdrop and deleted all the original files from mobile before I tried to open the received the files in my Mac (which I later found guilty). But now all the files received in my Mac are in grey color and whenever I try to open any of them, it says "the file is used by macOS and can't be opened". I'm looking for some advice here because those video files (mov format) are the ones I captured on my last trip. Any advice or help be truly appreciated.