Not sure how accurate or up to date, but here's one chart that shows most of the OTT services.
Big things missing from Youtube (last time I checked several months ago) are A&E, AHC, AP, AWE, AXS, BET, Bloomberg, CNBC, Comedy Central, Cooking, C-SPAN, Discovery, DIY, Food, Fuse, Fusion, FYI, GSN, Hallmark, HDNET, HGTV, HLN, ID, Lifetime, MGM, MLB, MSG, MTV, NFL Redzone, NICK, OWN, Reelz, Science, Travel, TVLand, Velocity, VH1, Weather.
They have a pretty terrible lineup considering the price. Even if you're dead set against AT&T, PSVue has a much stronger lineup and would be a much better value. You could probably even cobble together a far superior Sling TV package for similar money.
But if you never watch any of the above, then it doesn't matter. Personally, my family would kill me if I cut Comedy Central, Cooking, Discovery, Food, HGTV, NICK, Science, TLC, Travel, Velocity, Weather, which is why I'm pretty much stuck with DTVN, like it or not.