Youtube BBcode no longer works, mass change?

[pjkcards]

Thanks guys. Before I try ozzy's idea, I tried re-creating the BBcode. However, it just shows up as a big blank space, and the video doesn't load (just as before). I deleted the BBcode and created a new one with the same result. Any idea why this is?

MarkFL: looks nice, but I get the same result - a big blank space in the post, with no video loading. Are you using this in vB 4.2?

Any further ideas would be greatly appreciated. Ideally I want to make use of the youtube tag as opposed to doing a mass db replacement. Thanks.