When an MP4 video file takes up too much space on your hard drive or doesn't fit on the memory card for your portable device, you'll need to make MP4 smaller.
Mgbe onye MP4 video faịlụ na-ewe nke ukwuu ohere na draịvụ ike gị ma ọ bụ adịghị dabara na kaadị ebe nchekwa gị obere ngwaọrụ, ị kwesịrị ime ka MP4 nta.