I don't like when website plays anything right after loading.

I totally agree.. Auto playing videos or anything else for that matter, such as live chat, or even a pop message when you're trying to leave a website. ALL are very annoying tactics, IMHO.

Not too bad except the video, if you want to leave it there, just ask the customer if he wants to play it or not.

Autoplay is not a good idea on a webhosting website.