UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Firefox/52.0

Steps to reproduce the problem:
1. Go to one of any number of "tube websites" and various videos will make OSX crash.
2. Simply go to this website and play the video back, NSFW: https://www.daftporn.com/extreme-videos/Brazilian-girl-surprises-drunk-friend.php
3. 

What is the expected behavior?
During the video playback, the video freezes, the Apple/OSX wheel spins for about 10 seconds while the computer is unresponsive, the computer then goes to the OSX login screen with me having been logged out as a user.

What went wrong?
OSX crashed as a result of video playback.

Did this work before? N/A 

Chrome version: Version 64.0.3282.119 (Official Build) (64-bit)  Channel: stable
OS Version: OS X 10.11.6
Flash Version: 28.0.0.137

I tested this video in Firefox and it played back perfectly, no system crash. I originally thought this issue was the result of installing the OSX Security Update 2018-001 10.11.6 so I restored my mac using time capsule to a time before the OSX security update was installed and let Chrome update to version 64 and various videos are still crashing with Chrome 64 on OSX 10.11.6. This crashing issue has occurred with a number of different videos on a number of different websites, I just listed the one above as that was the most recent instance that caused OSX to crash for me.