Can I boost YouTube rank by buying more views after 5 days?

A lot of you are familiar with youtube ranking so I think it makes sense to ask here.

So I uploaded a video for a long tail keyword, bought 20,000 HR views and 750 likes and after 5 days it still sits at page 1, rank 10-12 and it looks like it's not moving much. The description and title are keyword optimized.

My question is, how can I get the video in the top 3 now?
Should I just buy even more views?

Thanks guys.