This is the same argument as the one against net neutrality. So if you your arguments are convincing to you here, then they should be there.

If you own a platform on which other people do business which is a natural monopoly, you shouldn't be allowed to regulate the content on that platform. Youtube is a natural monopoly. It's fairly obvious that this is so, but I will elaborate anyway.

The value of youtube is the number of people use the site. The number of people on the site encourages people to host their content on that site, more people hosting content on the site encourages more people to use the site. In this situation there will always be exactly one winner.

monopoly is not about being most popular service, it's about being the only supplier of some commodity or service. youtube is not the only supplier of video publishing service, hence it's not a monopoly. users can switch from youtube to another service easily.

users can't easily (and sometimes at all) switch to a different internet provider, which is why net neutrality is important.

you clearly have no idea what a monopoly is.

The dictionary disagrees with you.

http://bfy.tw/BBWT

The commodity that youtube sells is not only the ability to upload a video, it is the access to a network of viewers. It can be argued that due to youtube's network size relative to other video sharing website, it has a monopoly in that regard.

i don't agree. plenty of videos are being watched on facebook, instagram, twitter, etc, not to mention all the asian clones.

youtube just seems to be the most monetized platform for the time being, but i don't think it's anywhere near being monopoly in terms of access to users.