Thanks a lot buddy, I wouldn't complain if I kept it up like this ;-)
Thank yoo so much mate!
I at least felt that I have worked a lot and done my research right ;-)
The way I use Adwords is to promote my newest video. I do both in-display and in-stream. In the start I did it with around $15 per video for a 2 week period. Gave me maybe 500-1000 views per vid. As I also told in a previous post, I treat my channel like a legit business, and being brand new, you must have the market know about your product. So even if its "only" 500-1000 views (which is a lot in the start), it's all about accumulating your channels foundation. Even if I only gained 1 sub, it would still be a success.
With that being said - Adwords hasn't in any way been my way to success. It has just given me a little extra. My very first market research made me spot a trend that would apply to Rocket League (the game I play) in 2 weeks time from the time of my research. And from when I uploaded my first real video (1 month after the channels first upload) it just kicked off from there.
I only use it for newer videos, but promoting old videos is actually an interesting thought. Seeing that I am still very new, I mainly promote my newest video, because I improve a lot from each video here in the beginning. So I would rather promote a video where I have improved from the last videos flaws, because the quality will simply be better.