And a lot of nerdy cringe worthy jokes , but still , I haven't seen someone who talks about rather niche games instead of "FFVII BEST GAME EVAH!" or Bioshock or something.

Watched his top 10 underappreciated gems. You'd assume if he's going to call his list of games "gems" then the games should be remotely good. Over half of the games on his list are pretty bad. The others, I dunno, never played.

Which ones are bad?

I could only remember three so skipped through the video and yeah, actually only three that I've played and aren't very good.  So not more than half :P.  Just under half.  Although Sine More being a shmup didn't interest me in the least, and Lunar Knights never looked good to me.  FotNS Ken's Rage, Castlevania Judgment, and Mega Man X Command Mission are pretty meh. 

As for FotNS Ken's Rage, I can atleast say something good about it though.  I dislike the Dynasty Warriors games because of their layout and gameplay.  FotNS is level based with Dynasty Warriors beat em up style, and the gameplay is a bit more than just mashing this many hits then triangle.  It is, but if you hit square at a certain poinot of the triangle attack, you can do a frame attack which will introduce more hits.  So they did atleast try to make it better than the rest.  Basically, it's got potential, but doesn't make it a good game.  A bad game with potential is still a bad game. 

I disagree with you on some but thats cool =]

Awesome Top 10? Anybody can do that!
Here take notes!

10. CODWAW
5. BF4
3. BSI
4. FNV
2. RS6
8. COD4
1. RE6
6. BROTRR

Does the "Bro" guys like RE6? I never seen anyone who likes that.