Weirdly, I found that uploading videos as Private has a better effect.
One of my channels has a couple of copyright strikes (which means the unlisted option isn't available) so I upload as Private, give each video roughly 40 to 50 high retention views, just using multiple tabs with the same browser & IP, spread the views over 6 hours & then make them public.
Since doing this, I've found my videos tend to stick on the front page for 24 to 48 hours & there's no risk of deletion.
Also, I used to upload about 8 to 10 videos per day (using this method) but I found that only a couple of the videos were making it to the front page. Since then I've cut back to just uploading two videos per day (still using the same method) & both videos make it to the front page every time .. dunno why!?!
By the way, not sure if you can really call it `a method' or if there's other factors involved .. but it works for me.