Youtube video on Google

Does anyone knows, what are the things that pushes video on Google search ?
Today i was trying to understand how it works and well everything got even harder,
Video that has 1 Mil views and video that has 1k views ?

So this means its only about backlinks, embeds?
Traffic doesnt play a role here ? Or does getting into Google needs views?

So many videos out there, and so many dudes dont even know what a backlink is, so that would be a gold mine.