How to retrieve the url of the file

Hello,

I would like to view items (video, sound) separately.

Could you give me the miracle function that takes care of that.

Here is a sample format for youtube:
( print_r($node->field_video['und'][0]) )

Array
(
    [fid] => 157
    [title] => 
    [data] => 
    [file] => stdClass Object
        (
            [fid] => 157
            [uid] => 1
            [filename] => Итоги недели. Выпуск 3 - с Игорем Белкиным
            [uri] => youtube://v/RUU3P1PHV1I
            [filemime] => video/youtube
            [filesize] => 0
            [status] => 1
            [timestamp] => 1335634402
            [type] => video
        )

)

Desired result:
<iframe width="472" height="296" src="http://www.youtube.com/embed/RUU3P1PHV1I" frameborder="0" allowfullscreen></iframe>

or only :

http://www.youtube.com/embed/RUU3P1PHV1I

Thank you in advance for your help!