2 quick php files

I need a quick page creating for my converter for audio and video currently you will click the mp3 or mp4 button to be shown the download options. I need a php page where i can simply start a conversion via a direct url just by adding the youtube video url at the end you can see a working example here [login to view URL] It can be a single page to deal with both mp3 and mp4 or you can create two pages to store in different folders one for mp3 conversions one for mp4 conversions my site [login to view URL] you can see all the code you need in the files attached, testing can be performed live on my server via team viewer