As recently as ten years ago, computer hard drives had a capacity of 20 GB or even less. Now, hard drives can hold several terabytes of data. But the amount of data we store on our computers is also increasing all the time. For example, many movies today are available in high quality and Full HD resolution. These videos take up a lot of hard drive space, and if you want to store your video collection on your PC or Mac, even if you have a big hard drive, you really need to downsize your videos. And if you want to watch your favorite movies on a tablet or smartphone, video size reduction is absolutely essential.
the following Youtube will teach you how to reduce MP4 file.