[just.b.jealous]

Go to-

Admincp > Custom BB Codes > Add New BB Code.

Fill out these details:

Title:
Megavideo

BB Code Tag Name:
mvideo

Replacement:

<object width="640" height="344">
	<param name="movie" value="http://www.megavideo.com/v/{param}"></param>
	<param name="allowFullScreen" value="true"></param>
	<embed src="http://www.megavideo.com/v/{param}" type="application/x-shockwave-flash" allowfullscreen="true" width="640" height="344"></embed>
</object>

Example:
[mvideo]T87U9QTI50ec53ef0f1f87863fb3a84a94e38e872[/mvideo]

Description:
Megavideo Embed Code

Use {option}
No

Button Image: (Optional)
http://www.megavideo.com/favicon.ico

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

Then, when it comes to embedding a video,..

Click the "Embed Video" button that's on the megavideo page of the video you want to embed. They'll provide you with a code that contains a link in it that's similar to:

http://www.megavideo.com/v/T87U9QTI50ec53ef0f1f87863fb3a84a94e38e872

We would need everything after the /v/, so in this case it would be:

T87U9QTI50ec53ef0f1f87863fb3a84a94e38e872