Fun stuff! I towed banners in a C-152 for a while. My pickup technique was a bit different, though. I came in steeper (about a 10 degree dive) and a little fast with the hook trailing and then "swung" the hook down and caught the wire, firewalling it and pitching up as you do in the video - the pitch up was what "swung" the hook downwards. Not as radical as I'm making it sound.
I initially tried it shallower per your method, following early advice, but when one guy told me that my hook was skipping along on the ground one time I ditched that since I had nightmares of the hook snagging something and yanking my tail off ...
Six of one, half-dozen of the other ... only missed the wire once in all my pickup attempts, and of course that was the day I demo'ed it for the FAA with a major Thunderstorm north of the field, it was early a.m. and I was late for my real job, the FAA couldn't come back for a month, etc.
Fun as heck. All civvie pilots should do it a few times.
Wade