Does anybody know where these are from
 

Where are these from?







These are coming out as white squares on my screen. Am I doing something wrong?

You have to cut out all of the URL except for the code ater youtu.be/ so for the first one you would only use the mdknBSwhuhM portion between the YOUTUBE brackets and it will look like this.



if you post the full link it will come up blank.

Ah Thank you.

Wow. Nobody huh?