MP4 files are high quality video files that are compressed to take up much less space than in their raw format. Itunes and Quicktime both use mp4 video compression. Saving video files to this format can help you save space and carry around movies on portable devices.
Create a video file. You can either use a video file that you have or record a new one. A new file can be recorded and uploaded with almost any digital camera or camcorder. Programs such as Windows MovieMaker or Adobe Premiere can be used to upload and edit video files.
Find a program that can save video as an mp4 format. Adobe Premiere or many other video editing programs are available for this purpose.
Download a codec if your program does not support mp4. A codec is a program that converts or allows a program to open a file type that is not built into the original software. Programs that already have the ability to save as mp4 do not need codecs.
Open the program and then the video file you want to convert into mp4. Go to the "save or convert" menu and choose "mp4" as the video type.