That first test sounded like a mess, but he liked it. That is an incredible amount of delay(s) and effects on at once. The later tests all sounded great, and show how he really uses the delay like an instrument. He doesn't just hammer out one thing that is repeated, but he adds variety and makes it work well.
Edge won't be onstage cutting heads with anyone, but he does what he does well and he has been the guitar player in the biggest band in the world for the last 30 years. He is doing something right and he has my respect.
I haven't really followed U2 much after about the "Rattle and Hum", but you can't deny he really invented his own sound and has kept it fresh for a long time. I remember being knocked out by them in high school when "Sunday Bloody Sunday" hit.
One of the marks of a great guitar player in my book is a signature "sound". Edge has one of the most unique and easily identifiable of those in modern music. I recall in the early to mid 80's an explosion of ads in trade pubs and music shops seeking guitarists with "the U2 sound" - phenomenal!
I enjoyed it and all. I definitely am a fan of The Edge, but...with all the new floorboard delays and seemingly EVERYONE in church music going after his style, I didn't see him demonstrate anything in that clip that made me think WOW. I guess props to all the YouTubers out there for getting it done. He is the author though.