That's actually one of many tricks that YouTube uses to censor right-wing content.
Among the tricks:
- Removing videos for flimsy "content violations".
- Making the video rate poorly in searches, even if far more popular than other videos which come up earlier in the search results.
- Restricting videos to "adults" who are logged in and listed as 18+. On the surface, this seems reasonable,
but in reality it creates an extra step to view the video -- one which many YouTube viewers don't want to deal with (many people aren't logged into a google account). Again, the standards for restricting such videos vary depending upon the political views expressed.
After the recent James Damore debacle, do you really think it's unlikely that Google has built in biases against conservatives?
They already did it during the election. During the concerns about Hillary's health (when she fainted in the blistering 74 degree heat), searches for "Hillary Clinton health" came up with nothing in the auto-fill. Instead, it kept trying to suggest "Hillary Clinton healthcare".
There were tons of examples like this.
YouTube is no different.