Well, the reason why there is a lot of dislikes on that video is because much of the Youtube community refers LGBT+ acceptance as extremist "Tumblr feminist" views. You know, the "UR TRIGGERING ME!!!" thing. Such extremists are often the target for such hate, and because people blow this out of proportion all LGBT+ advocates are laughed at. For example, if you refer yourself as non-binary you are automatically told off and labeled.
Youtube is a big site with tons of people on it. You will get many different opinions so it'll really depend on what side of the site you go to. Unfortunately, the community is mainly centered around hate and getting popular by pessimism and harassment. The LGBT+ community is still a taboo for many people so it's not much of a surprise that this video got so much hate. Plus, Google is a mulit-million dollar company, and companies of the like are often viewed as impassive to the regular people and hop on to what's popular just to get attention. I'm pretty sure Google is very LGBT+ friendly judging by the type of people who work there, but not a lot of people like Google as a company.
Despite being a person who's in the LGBT group, I'm not super-duper passionate about LGBT+ acceptance. I'm not angered by this, but just kind of upset that there can be so much hate on one little video about kindness.