AITA for sending my Airbnb host a 4-minute walkthrough video with timestamps before I unpacked?

Checked into an Airbnb yesterday. Before I touched anything, I did a slow walkthrough of every room with my phone, narrating any existing damage I noticed. Sent the video to the host immediately with a polite "Just want to flag a few existing issues so they're documented before my stay." Host replied: "This is incredibly insulting. I've never had a guest do this. You clearly don't trust me." My GF says I went too far and sounded paranoid. Two friends say it was smart because last year a host charged me $400 for a stain that was already there. AITA?