I've also noticed an oddity with the youtube media definition not always working. I cannot state wether this was due to the 3.8.3 upgrade or not, but I don't think it is.
Why? Well I've spoken to some users and asked them to supply me with the URLS they actually put into their posts, both for working and non working youtube media. I've found the following:
A url of this format does work:
Code:
http://www.youtube.com/watch?v=XXXX-XxXXxxX
A url of this format does NOT work:
Code:
http://www.youtube.com/v/XXXX-XxXXxxX
The reason to me is obvious, the format of the urls are different and the youtube definition seems to be working on the one with "watch?" as part of the url. Thus I would assume you could add a new definition via exporting the existing youtube one, changing the key for it and of course the regular expression it's looking at and then import it as a new definition
I've exported and imported my "new" definition, but I'm no expert on regular expressions, so I'm a bit stuck here.
It's possible this problem has always existed, or it could be that youtube has changed something in regards to it's url format and it's co-incidence that this occurred when vB 3.8.3 was released.