doneLol. That's some nice illegal-sounding file names you have there.
As long as this is 'any old random file' and perfectly legal, then it seems some program has locked your files. Try a restart.
Regarding 'not found' error: the files may be split up, Find the .mkv file and put it in same place.
I cant understand what do u mean..Seriously dark grey almost black conversation going on here. I'm a hot second from deleting this thread. Perhaps you want to remove those images and replace them with text that doesn't include the questionable filenames.