Off the top of my head, Hans Weilenmann, Craig Mathews, Walter Wiese, Matt Grobert, Davie McPhail, Hans Stephenson, Rob Weiker (Lakestream Flyshop) and the guys at Headhunters put out some excellent videos that have really helped me. And these are mostly trout flies; haven't even touched saltwater/warmwater.
Regards,
Scott