Reddit is the clear winner for me. It takes some patience, and you have to be cautious on where and what you are posting, but the thing about Reddit is that it's not all that different from YTTalk. It is a community and if you don't involve yourself in the community, you can't expect your self promotion to be innocently ignored, just like here. The vast majority of people from YTTalk that have read uberdangers post and not grasped the idea that their content isn't really that great, is quite high. You need to post your best stuff, in the right location at the right time all the while putting effort into the community side as well. *shrugs*
I could see Facebook being of use, but I'm cautious because they actively and brazenly IMO fleece business. The whole not showing posts to people in your fan page unless you pay for the exposure is absolute tosh.
Twitter needs a big audience in order to be of value IMO. It's a much more instantaneous, I want to put eyes on THIS RIGHT NOW kind of social media construct. So things like live events can work really well.
Good advice! I do fact videos, like, "8 Shocking Facts About Netflix". So something that has worked for me and these type of videos, is to edit the first ten seconds of my video together and give away one fact and then put in a title card that says something like, "Full video on Youtube, link below" and then put the link to your Youtube in the description.
This has worked pretty well.
Blech, buzzfeed style b******t... This kind of "content" is the reason I don't ever read anything on Facebook anymore.