If you want to convert streaming video from YouTube into an MP4 there is a converter you can install on your computer. Go online and look for a youtube converter mp4, this search will give you a list of all the different converters that are available online. Now that you know the names of all the different MP4 converters that are available it would be smart to find out what other people are saying about the software. If you are pressed for time you should just look at the total number of downloads that have been processed, the YouTube MP4 converter with the greatest number of downloads is the one you should install on your computer.