NyanCat_Polska (real name Alan Woźniak) is an active Polish player and IRC / Discord user, and a former mapper. He plays both the 2.0 version and NReality as well as N++.
(As of October 25th, 2015)
YouTube channel Edit
Woźniak has his own YouTube channel on which he regularly posts replays from Nv2.0 and NReality. Other than that, he used to submit clips from other (mainly rhythm) games like osu!
At some point, he also made a channel designed to publish just replays from N, called ￼N - The Way of the Ninja.
NyanCat_Polska has a SoundCloud account, where he uploads experimental and dubstep / d&b music. His producer name is Amane:OG.