Release 2.3.1 of the QT-based video editor brings various improvements such as a new transform tool, new preview window, and the return of the razor tool as well as various bug fixes and performance improvements. More on this release can be found in this release announcement.
(Score: 0) by Anonymous Coward on Monday April 03 2017, @10:23AM
Try shotcut or lightworks. Also an mp4 container doesn't really tell us anything about the codecs, we can guess the video codec is h264 long gop [pcmag.com] which isn't ideal for editing.