First, thanks to everyone who will read this and will consider helping me!
So, I do have a huge issue with Youtube since yesterday, I do use Maxthon since several weeks now and everything was totally fine with Youtube and all the others website; But yesterday, I was watching a video when the internet page went blank. I tried to reload the page a lot of times. Then I closed Maxthon, and when I opened it again I had a message on Youtube telling me that my website cannot run Youtube. Now I don't get this message anymore but I'm still unable to get Youtube. A strange fact is that I can still perfectly watch Youtube videos on Facebook or Twitter.
Again, this happened in two seconds, nothing changed, no upgrade, no extensions or anything, all it's the same now than yesterday. I tried to disable Violentmonkey and the others extensions, nothing change. I'm totally lost.
Thanks a lot for your help, and have a nice day.