Maybe I’m the only one who didn’t know this, but Aves supports built-in video editing, which was a feature I loved from the non-libre version of Simple Gallery, but well, we all know what happens with those apps.
I’m not using the Libre version of the app so this feature may be not available in that version, but both the Libre and this one are available in the F-Droid (or IzzyOnDroid) repositories, as far as I understand the only difference is some proprietary libraries, but I’m not sure at all about this, so please correct me if I’m wrong.
So far the Aves video player is also the only foss player I’ve found where you can freely zoom into a currently playing video.