Since i get a lot of questions on PM, I'm gonna say publicly that everyone can see.
1. Upload the video and set the video as unlisted.
2. Boost it with like 2-3k views (rattention must be 75%+), since there's no HR views on the market but the only ones with 1-2min, make your videos shorter
- So if you're buying videos for which you know they have 90sec rattention, make sure your videos are max 120sec long
3. Add 50 Likes + 10 comments (should include keywords from Tittle) + 50-100 shares on social media
4. Once it's all done, set the premiere date, and boost it with premiere views for a few hours straight.
That's should be it.
Also it all depends on your niche and competitiveness of the keywords you're trying to rank.
Let me know in the comments did you have any sucess with this.