Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
The YouTube clips leave a lot to be desired, because YouTube compresses the heck out of things and I haven't figured out how to encode videos for the best YouTube quality yet. But click the still pictures in that post (which are just frame captures from the full-sized video) and you'll see some wild Alaskan fish up close & personal.
I wish I could share the full HD video with everyone, because it's really, really cool, but the file size is about a gigabyte per minute.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist