Prevent embedded Youtube videos from breaking in iOS

When using Youtube's older embed code to add a video to my slideshow, the video plugin broke the video in iOS (tested on an iPhone and an iPad Mini). I fixed this by adding a quick check to make sure that the browser has support for at least FlashPlayer version 1 (iOS reports "0"). The plugin then only uses swfobject to embed content if Flash is supported by the browser.

I also removed the `? true : false` ternary operator, because the expression should already evaluate to either `true` or `false`. Let me know if I'm missing something.

I re-minified the plugin using the YUI Compressor. Let me know if you'd prefer to have it minified some other way.