[PinkMilk]

It could be done with iframe...

Title:xboxclips
BB Code Tag Name:xbc
Replacement:

<iframe src="{param}" width="560px" height="324px" frameborder="0" scrolling="no"></iframe>

Example:

[xbc]http://xboxclips.com/dylan%20is%20white/ce62cb9d-6029-4810-b5cd-99f6927afcba/embed[/xbc]

Description: Whatever you like
Use {option}: No
Remove Tag If Empty: Yes
Disable BB Code Within This BB Code: Yes
Disable Smilies Within This BB Code: Yes
Disable Word Wrapping Within This BB Code: Yes
Disable Automatic Link Parsing Within This BB Code: Yes

However...This could be abused and anything/any page put into it.

The fix for this would be to make members only enter curtain parts of the embed url such as the part highlighted in red:

http://xboxclips.com/dylan%20is%20white/ce62cb9d-6029-4810-b5cd-99f6927afcba/embed

and change replacement to:

<iframe src="http://xboxclips.com/{param}/embed" width="560px" height="324px" frameborder="0" scrolling="no"></iframe>

and example to:

[xbc]dylan%20is%20white/ce62cb9d-6029-4810-b5cd-99f6927afcba[/xbc]

...however this is not a "simple" cut and paste thing for members and most will probably just paste the full link and then wonder why it didn't work. I'm not saying members are stupid but 99.9% would assume/expect it to be a case of the full url not just a part of it.