This Plugin is not supported???
 

So if you use chrome on an android phone you are likely to see the error message
This Plugin is not supported when trying to view Flash content.
According to Google they are trying to make the world a safer place by forcing use of open source like HTML5.
But Google owns Youtube does it not? So why when I try to watch a YouTube video on Gfy do I still get that error?

The most logical answer to this is....Are you ready.....

The vBulletin plugin that allows YouTube videos to be imbedded is no longer supported.

The issue has already been mentioned in at least 2 other threads.