How can I trim an MP4 video without increasing the file size?

How can I trim an MP4 video without increasing the file size?

I don’t understand why so many aggressive answers about your question. Don’t bother it bro. About video quality and size, the bigger size may have better quality than the smaller one. However, there are many other factors which can affect your video quality. If you record video with your smartphone, GoPro, or a DSLR, the file size is often big because of the codec and software they use. When adding these clips (footage) into video editors, you can choose lossless codec to export your clips to have the same quality. Being noticed that the file size will be the same with the original clips as they are not compressed by the software.