I had a similar experience with that same video. It was suggested to me in the YT recommendations (I had watched Bill Hader on Late Show with Stephen Colbert pr

I had a similar experience with that same video. It was suggested to me in the YT recommendations (I had watched Bill Hader on Late Show with Stephen Colbert previously). I genuinely thought "wow, when he squints his eyes he really looks like Arnold". The transitions between Bill's own face and Arnold's were totally seemless to me. I finally realized what was going on when I saw the channel's name, and it spooked me that I had fallen for it.