As a newcomer to DCS, I have really found a huge range of information from Youtube. I have found myself watching hundreds of Cap's videos on the GR page, and learned a huge amount in a short space of time. I am more interested in the ground attack roles, so have only dabbled with GW and others.
All I can say is thank you to all who have posted this sort of stuff online. I do enjoy reading manuals and learning stuff, but sometimes I need to see something being done or be told which thing to press in what order.
I am still annoyed with myself that it took me so long to join DCS.