Question about Youtube million views efficiency sales?

Ok, we all heard of making money through youtube and I am planning to do so

Just a quick question though, provided you have put the watermark on the video or link on the description and then have hundreds of thousands of views to millions of views clicks in Youtube, do they convert well?

I mean i know it depensd on which niche but I mean just in general? Or it could be not efficient as in general since you can hundreds of thousands views but you may only convert 10 or 20 sales?

Any people willing to share their experiences will be great to help all of us out

People love videos and youtube gets alot of traffic. I think thats why google bought them for billions of dollars. Videos convert as long as you optimize them correctly for the keyword your going after, and also not forgetting to hyperlink to whatever your selling..