BunnymundsGirl wrote:WHY am I always getting negative comments on my videos?! That comment is so irrelevant! You know what? If this trend keeps on happening to me and my videos, then perhaps I shouldn't be making rants anymore.

Just a theory:
If you're ranting about something, you're generally not going to say many nice things. All the negative thoughts released in the video are then absorbed by the minds of the viewers, and as such, their thoughts tend to become negative as well.
The human brain is very sensitive to what it is exposed to, especially subconsciously. I'm almost certain that if I took a group of 100 people, and made 50 watch a positive review of something, and the other 50 a negative review of something, the ones who saw the rant would probably not be in as good of a mood, on average. Most people are a whole lot nastier in such instances, and such behavior can easily be exacerbated behind the curtain of anonymity that the internet provides.
It is often said that kindness is contageous, so it only makes sense that rants are as well.