Like I say, with the YouTube hack I found in a thread on this site I'm able to click the 'flash' button and paste in a YouTube share link and the video shows up.

So I'm not advocating removing the 'flash' button but what I would like to know is what the 'flash' button was for though? I mean if I click the 'flash' button on this site it asks for a flash url, without the YouTube hack what url are you meant to put in this box?

I just don't understand what the purpose of the 'flash' button was for?