Google is a well known company. There is no reason not to trust this at all.
All of the reviews saying that there is inappropriate stuff on there, is right, but of course there is. It is social media so of course it is inappropriate sometimes. The point is it is virus free and totally safe.
The website is safe, but the downloads are possibly unsafe. These files are posted by users, so some may have viruses. I'm not saying all have viruses, but some do. Be caution when using this site.
I have no problems using this website at all. I use the app a lot. Perfectly safe.
DO NOT USE THIS WEBSITE!!!! I am too scared to use it, because there are many videos using this app and it harms their computer with a really intense virus.