Big List of YouTubers

Below you can find +150 YouTubers (with subscriber count, email adress and info about liked and not liked genres) and 130+ additional YouTubers (only with subscriber count).

Here are a few relevant links for your consideration:

Everything You Need to Know About YouTubers but Were Afraid to Ask (by Alex Larrabee aka BaerTaffy / GDC 2015)
Using YouTubers/Streamers to Market your Indie Game (by Ryan Letourneau aka Northernlion / GDC 2014)
How YouTubers and Twitch Streamers Can Help Sell Your Games (by Mike Rose / GDC 2015)
Big List of Twitch Streamers (by tinybuild)
Big List of Video Game Sites (by PixelProspector)
More Resources can be found here and here

Subscriber Count Tiers:

Small: < 5.000 /// 5.000 - 10.000
Medium: 10.000 - 50.000 /// 50.000 - 100.000 /// 100.000 - 500.000
Big: 500.000 - 2.000.000 /// 2.000.000 - 8.000.000 /// 8.000.000 - 40.000.000

Note 1: None of the YouTubers cover Mobile games.

Note 2: Currently it is not possible to submit new YouTube channels for possible addition to the list. (however a new submission form is in the works)

Note 3: For some reason when a google spreadsheet is embedded it seems to add a google.com redirect to each link.... however when you view the spreadsheet directly here it doesn't add any redirects.