That's for 3.5.4 so is severely out-dated. Eric, this modification is much better: http://www.vbulletin.org/forum/showthread.php?t=202476 Users simply paste the URL to the video in their post, and it automatically embeds. It also works with 100s of other video websites. It is one of my favorite vB modifications.
That mod won't even install for me and they didn't even give a "read me" file to tell me how to install it. I just purchased vb a week ago and I have had more problems than any software than ever used. My god what a buggy software. Even logging in is a challenge if you don't take out the www. before the yoursite.com. I'm extremely frustrated.
1 - I'm not sure what you're talking about - the modification installs just fine, and does indeed include README documentation. It's one of the most popular modifications for vBulletin with almost 2,000 installs. 2 - If you're using vB 4.x, which is beta and unstable/unsupported software, then what do you expect? Bugs are normals in this case. Use the stable version, that being 3.8.