[confus]

Great hack, means user doesn't have to learn just the right thing to put in there

Didn't seen to like videos with the v, e.g http://www.youtube.com/v/8O6kci9orm8
(some use that format as was the old system)

ended up adding the lines:

'#\[YOUTUBE\]http://(www.youtube|youtube)\.com/v([\w-]+)(.*?)\[/YOUTUBE\]#i',

'[VALIDYOUTUBE' . $ytgv_key . ']$2[/VALIDYOUTUBE' . $ytgv_key . ']',

in their respective places to recognise that url format
not important but I also didn't want all that table data and such, so replaced the code with basic embed code as shown is on youtube pages

for anyone seeing the attachment, it is NOT the correct version/file, download that from the top post of this page
the attached file has the edits I mentioned above(accepts /v/ and outputs simple embed code), works for me