Some guys might be a bit skeptical about a potential new client sending a video with specific things he would like to do. I'm not talking only about law enforcement but also as you post as a potential scam.
I would suggest telling him what you want to do by text, and in a second session sending a video about a certain role play or specific scene you'd like to do
Besides when potential clients are very explicit in many cases escorts might think they are jerking off wasting their time.