Very credible source. One of top 10 guilds in the world i believe:
http://www.learntoraid.com/
Lady Beth'Tilac 10m
Kinda funny at first but then gets serious, lol:
https://www.youtube.com/user/learntoraid#p/u/4/L8OQFgKTn_Q
Lord Rhyolith
https://www.youtube.com/user/learntoraid#p/u/3/aRKayYLQ8Lw
Alysrazor
https://www.youtube.com/user/learntoraid#p/u/5/GTD2ciqd3CM
http://www.learntoraid.com/
Lady Beth'Tilac 10m
Kinda funny at first but then gets serious, lol:
https://www.youtube.com/user/learntoraid#p/u/4/L8OQFgKTn_Q
Lord Rhyolith
https://www.youtube.com/user/learntoraid#p/u/3/aRKayYLQ8Lw
Alysrazor
https://www.youtube.com/user/learntoraid#p/u/5/GTD2ciqd3CM