Hey guys, my name is cristian! im colombian (im not sure if i am in the right place to post this)

I want to ask you about what videos i should see to improve my game, i am a winner in 10nl and 16 nl in Pokerstars 8-9 bb/100 in more than 200K hands but for some reason i can win in 25nl i ve tried all, i pay coach, i watch videos, i study my HH but just i cant win. i ve played near to 100K hands and i lose to -1bb/100 in 25nl, and its a bad thing to me because i have worked hard.

Now, Im new in this site, someone could recommend me some videos? or some trainer?