my friends FOR SURE blocked me but i wanna know for sure for sure. is there a way to tell? like 100% confirmed they blocked me vs just deactivated or something. asking before i do something embarrassing 
If you want to be 100% sure try clicking on an old DM or a comment where they were tagged. If their profile pulls up but it says “account not found” or looks totally empty and you know for a fact they post videos you’ve definitely been blocked.
almost every platform works the same way. justr search for them from your account vs a logged out browser. can’t see them logged in but can logged out? blocked. can’t see them either way? deactivated. why do we keep having this thread lol
The search test others mentioned is the most reliable path for you. Just make sure to check from a second account or logged out, not just your own account because from your own account a block and a deleted account can look identical. The comparison between two viewpoints is what actually tells you whats what.