Saw the hatch last year and I'd say 10 is too large.... probably a 12 or 14, closer to a 14. Will try to hit the hatch again this year. That video is a typical hair wing fly. Looks pretty good. I tied up some typical catskills, some spent wings, and a few white foam hopper style flies to get some attention on the water last year. Didn't find any fish though lol. There are a TON of flies on this hatch, so you need to get some attention to yours against the naturals. A simple drift, unless you're casting over a consistant riser, is tough to get strikes. Fish won't be leader shy and you'll probably get a lot more bass than trout. Also it's not unusual to get a carp or catfish on this hatch, so 6x is not the way to go lol.
Good luck and have fun.
Ryan