If you are planing to start a video website like youtube, here is some things to keep in mind.

FLV PLAYER
========

You know in now a days most of the video streaming websites use flash player for video streaming. The video file is in flv format. So you need a flash video player for this purpose.
You can download a free flash / flv player from : http://www.jeroenwijering.com/?item=JW_FLV_Player
or http://flowplayer.org/

FORMAT CONVERSION
===============

Now you need videos in flv file format. In normal cases, most of the videos uploaded by an user will be in avi, dat ,mpg,mp4 or 3gp. So you need a flv converter. You can use either ffmpeg library or mencoder for this purpose

Here is a sample video emmbedding method.

Here src parameter points the swf file, the flash palyer and video parameter points the flv file. This is the format of player i used in http://www.amvizone.com

ffmpeg also can be used for making thumbnails and video watermarking

STORAGE and BANDWIDTH
=====================

Where would you save flv files. In yourown server ? If there is a minimum number of videos, your server might handle it. But consider the case having a large number of videos, your server bandwidth will get used soon. So we have to switch into a CDN (Content Data Network) like amazone S3. What you have to do is just register with any CDN website and use their webservices for uploading and manipulating your video files. These CDN have very reasonable cost for the bandwidth usage and storage space.

Comment here if any queries
Regards

Sajith M.R

If you want to get the FLV file of any youtube video url using php code, here is the solution.

If you are a PHP Programmer and if you are working with any video website, and if you need to grab videos (FLV files) from youtube and to put it yourown site (not object embedding) , Download the Full Source Code given at the end of this article (ZIP)

I used this php code for the Youtube video download tool http://www.googleneedle.com

Here function getPatternFromUrl is nothing but, get the exact pattern of a particular video from any youtube video url format.

In the above case , it returns pzmP4UvZRa4

The function is below

function getPatternFromUrl($url)

 {

$url = $url.'&';

$pattern = '/v=(.+?)&+/';

preg_match($pattern, $url, $matches);

return ($matches[1]);

}

GetFlvFromYoutube is the main function here, which download the flv file from youtube pattern and saves to your local machine.
The function is below:

function GrabFlvFromYoutube( $pattern )
{

 require_once ("phptube.php");

 $tube = new PHPTube ();

 $flv_http_path = $tube->download($pattern) ;

 echo $flv_http_path;

 set_time_limit(0);

 $data = file_get_contents($flv_http_path);

 $new_flv_path = dirname(_FILE_).'/flvs/'.$pattern.'.flv' ;

 file_put_contents($new_flv_path, $data);

 return $new_flv_path ;

}

Download the fullsource code from this link given:

http://www.sajithmr.com/downloads/youtube-download-php.zip