Mobile
There are a wide variety of internet companies which host free, downloadable MP4 videos. Reputable examples of such companies include PSP2b, Zimbio, and Real.
I'm not really sure what you're asking. If you want a site to get mp4 videos off, mp4 videos can be downloaded from Youtube. Put this in your bookmarks and click it while viewing a Youtube video to get the mp4 file: javascript:if(document.location.href.match(/http:\/\/[a-zA-Z\.]*youtube\.com\/watch/)){document.location.href='http://www.youtube.com/get_video?fmt='+(isHDAvailable?'22':'18')+'&video_id='+swfArgs['video_id']+'&t='+swfArgs['t']} If you want a site that you can upload a file and let others download it, iFile it is a good site to use: http://ifile.it/ Please try to be more clear with your questions.
youtube mp3 and mp4 converter
maybe
Any porn site that hosts videos for free.
on the computer
MP4 videos are generally played through iTunes, Quicktime, or a third party codec utility such as VLC Media Player. These programs are all free and should allow you to properly view these video files at your leisure.
Mp4 mp4-avc avi-mjpge mp4-avc mp4-avc (720×480)pmp pmp-avc
Go to cnet.com and download "free convert MPEG WMV to MP4 FLV AVI converter" you can use it convert videos to play on your iPhone, Xbox, PSP, and iPod.
mp4
No of course not