[The Geek]

Regular Expression:
The regular expression is a pattern that matches the contents of a URL tag. For example the following regexp:

PHP Code:

[http://]*[a-z]*?[\.]?youtube\.[a-z]*?/watch\?v=([A-Z0-9._%-]*)[&\w;=\+_\-]* 


Matches all forms of youtube.com URLs in a post. If there is a match, AME knows to embed media.

Replacement:
This is the embed code that AME actually inserts into the post instead of the link. Technically speaking, it is what appears in the AME templates that are inserted into the post instead of the URL that the user entered.

Extract definition data:
This is an option that tells AME to go fetch the destination page when a match is made when the post is being saved. AME will then extract the page title. In some complex definitions where the URL doesnt contain enough information for the embedding to occur, AME may have to get the destination page to get the information required to actually embed the code.

Embedding Regexp:
In the case where the URL doesn't contain enough information for the embedding to occur, AME will need to fetch the destination page and extract the information it does need. In this case, this is the regular expression used to return the information AME needs.

Validation:
Some sites have external embedding disabled for some of its media (i.e. youtube). If extract definition data is on and there is a validation RegExp, AME will fetch the destination page and run the regexp on it (the regexp generally tries to match the text found in the destination sites Embed HTML textbox). If it finds what it is looking for, AME embeds, otherwise it asserts that the media cannot be externally embedded and as such, AME simply presents a link instead of a broken media box.

HTHs