William Morder via tde-users wrote: > Like yourself, I imagine, I hate change, hate the need to rebuild my > system that was working just fine. But once that release is no longer > supported, it doesn't make much sense to keep using it for years beyond > its security updates; whereas Buster/Beowulf LTS will be supported for -- > how long is it? -- 5-7 more years. Yes indeed - I can use a VM as a guinea pig, but not my own PC, so usually I would wait a bit after a release updating my production system(s). The good thing is that many people use testing and report back issues, so that these issues get solved. I do not see a reason not to upgrade to stable couple of months before it becomes old stable. Just install and try mplayer from the command line - I am sure it was working fine with mp4 files under stretch. read this: https://wiki.debian.org/MultimediaCodecs