Japanese Guy TV: https://www.youtube.com/user/08uj0045
I am guessing this guy works at for an airline as he travels to the UK and the Netherlands very often, two countries with great darts players.
Darts Review Channel: https://www.youtube.com/user/dartsnutzdotcom
I dare say he is the person to turn to if you want to buy darts. He has uploaded tons of reviews and they give you a good view on the darts that you may buy.