Ken McLeod has a background in Vajrayāna Buddhism and Tibetan linguistics. His style of teaching is straightforward with a non-religious, Western presentation. His book, "Wake Up To Your Life", is one of the best practice manuals I've come across.

Ken doesn't have any youtube videos, but his podcasted courses are an excellent listen. There's hundreds of hours worth of quality teachings here:
http://www.unfetteredmind.org/audio/