I captured AVI video with camera, downloaded to my PC but Video Trimmer does not recognize the format so no trimming. I actually wanted to convert the format too since 135MB is too much to send per Email. No luck.
One of the most obscure-but-helpful applications in the Linux Mint software manager. Very accessible. Perfect for those who like to clip long videos and send it to their friends, or those who need to sample videos period. It's only a 4 instead of a 5 due to the very simple UI not scaling as well to extremely long videos and having to cut one clip at a time.
I had an MP4 that was too big to send and Video Trimmer allowed me to cut it to size. Took 15 seconds and no manual needed.