At some point, YouTube realized they are more-or-less the only game in town and started to go from 1 ad every 0.5 video to 2 pre-roll ads, a mid roll ad and som

At some point, YouTube realized they are more-or-less the only game in town and started to go from 1 ad every 0.5 video to 2 pre-roll ads, a mid roll ad and sometimes at near the end another ad. They also made some 30s-1m ads unskippable.