Do embedded video views count?

How many seconds of the video need to be watched to get counted?

Yes, embedded videos views do count.

Even with autoplay turned on?

embed views count but much slower , and auto play unfortunately from my experience doesn't work good , Without autoplay more views were recorded from my experience.

Autoplay doesn't count anymore (unless it is on your channel), and embedding got lower ratios than anything else.

Most views will register.

How to find in with position (in witch page by keywoard) are your video by tags?