I'd like to share my experience and findings with some recent tests of likes and dislikes on YouTube. I tried on 4 different cases. I added 100 likes to 2 videos and 100 dislikes to 2 videos. I waited a few months and saw it had zero effect on the videos. The videos that had age and high retention views stayed put at #1, even if they had 100 dislikes and 10 likes. The videos that were new and didn't have many real views didn't move, even if they had 100 likes and zero dislikes. The videos that were new and did nothing but offer value which brought natural high retention views, easily hit 1000 real views in targeted buyer traffic.