[MF] tried to surprise my husband with a personal video we recorded and it went hilariously wrong

OK so my husband and I have been staying with my FIL for the past month due to him having an injury that has kept him immobile and in need of our help until he is healed. This is the same house my husband grew up in so we are in his bedroom which is next to my FILs office/mancave where he likes to sit and watch TV or do work from home on his computer.

My husband and I enjoy making our own videos on our phones and watching them on our flat screen so sometimes we will sync my phone to our TV (obviously we mute the TV since we are staying with his father and step mom