Speed tape, the goal is to reduce drag for small things like paint chips and such. During takeoff/landing, the most dangerous thing is stalling due to low speed, so a little bit extra drag can be a big deal. Looks like there’s so many wrinkles in most of that tape that it probably is being counterproductive.
I wonder how many papers he’s read since ChatGPT released about how bad it is to train AI on AI output.