UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3188.4 Safari/537.36

Steps to reproduce the problem:
1. Open www.youtube.com
2. Open any video page in a new tab with "Open link in new Tab" without visiting the page

In the Task manager you can now see that tab fully utilizing a CPU Core.
Youtube is just an example, it happens for any Page with a video which has not yet been visited.
Once I visit the page the CPU usage drops to expected levels.

I also tried it without any extensions, but I got the same issue.

What is the expected behavior?

What went wrong?
Unvisited Page with video fully utilized a CPU Core
I'm on a fairly fast PC so that shouldn't happen.

Did this work before? Yes 

Chrome version: 62.0.3188.4  Channel: dev
OS Version: 10.0
Flash Version: