I can't believe you actually made a topic for FF. Good luck keeping it unlocked.
He's (regrettably) one of my favorite youtube channels at the moment- Being quite possibly the most creative content creator(of his popularity) on the site. I mean sure it's all putrid, but the amount of culture and inspiration worked into his... Body of work is kind of amazing. Also, his videos manage to be equal parts funny and gag-worthy, which is impressive.
That said, I don't know if I'd recommend his videos, per say. It really depends on your tolerance for twisted humor(in every variety thinkable). His mission statement is to insult and degrade every viewer he can, so take that as you will.
Also, I probably wouldn't have you watch his videos if you're under a certain age(not accounting for personal maturity)... I know that sounds really patronizing, but I think it's for the best. Personally, I wouldn't have wanted to discover Filthy Frank any younger than I did.