Here are some of my favorite...
Shawn Farquhar Live: His work with the omni deck is great. He teaches 3 fly with great detail and also goes over his awesome deck switch. There's also a lot more great material.
Shimshi Live: The lecture is worth it for the advice. He only goes over two effects (haunted deck he performer on Ellen and the hummer card he perform on the Kris Jenner show) but he also goes through how to promote yourself, how to dress, website tips, how to design business cards, and a lot more.
Richard Osterlind 2 Live: He covers great mentalism. The effects he teaches don't require a lot of setup and gimmick construction.
Bizzaro Live: His effects are great but almost all of them require some kind of gimmick to build. Other than that the lecture is worth it. He gives awesome advice about creativity and building a character. The tricks that are heavily gimmicked are worth the time it takes to construct.
Devin Knight Live: He gives A LOT away. He gives PDF files that explain almost all of the effects he taught. He also gives the PDF photos for his clever baby gag.