Video Extraction Script (PHP)

We need several PHP functions to extract direct links to media files from pages of some media websites. Functions should be created in pure PHP language only to work in background on our server, i.e. it should not be browser extension or something similar. Any standard PHP extension (curl, etc.) can be used. If page have several versions of same file with different quality, link to file with best quality should be extracted. If page have several versions of file in different format, MP4 format is preferable. Function should look like this: function extractFileYoutube($pageURL) { // ...some code return $directLink; } For example, if function will be called for this link: [login to view URL] it should return this link: [login to view URL] Produced link should allow to download file by wget or download manager without opening the webpage of target website. List of necessary websites: [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] [login to view URL] Only candidates with similar working experience will be considered and you will be asked for a demo or similar work done.