Avalar Yeah, unfortunately I'm not very technologically capable myself, so I'm not the right person to answer questions about vulnerability at the level of code or anything. I know Cryptee comes recommended by multiple privacy-oriented groups/people, and it doesn't have any shady connections/practices that I know of, so I just kinda take it on trust.
And as far as photos/videos go, I'm afraid I can't be of much help there either (sorry!!). I use Cryptee only for note taking. (I did upload a couple photos just now, though, and saw that timestamps were removed for me too). I guess you could reach out to Cryptee support? Again, sorry I can't be of help here.