You are having a large amount of, let's say DVR recorded tv shows
TV shows are a good example as they are usually recorded with approximate start and stop times, there are many different shows in one recording etc.
File.avi <Beginning of fileBOF>|show1|show2|show3|<End Of FileEOF>
So when previewing it would be a snap to mark split points,click right mouse button and choose "Split file".
The resulting file(s) would be split with the same name plus -number suffix
File-01 <BOF|show1|<EOF>
File-02 <BOF|show2|<EOF>
...
Cropping would work just as picture crop function in every Image editor;
mark an area and "Crop" to discard everything around that area.
File.avi <Beginning of fileBOF>|show1|show2|show3|<End Of FileEOF>
Crop and result:
File.avi<BOF>|show2|<EOF>
I haven't seen this feat in ANY file manager, and it is GOLD for this application.
Of course, If I see this in XYplorer, I want to be contacted on my email, and given substantial percentage in advance to our forthcoming cooperation.
XYplorer Beta Club