Any ideas what actually works nowadays, please - and is free (even if it is a giveaway for limited time only)...??? Cropping, cutting, choosing formats, resolution, audio channels, subs etc. Not very complex editing, that is... Thanx!
For editing try Shotcut and for screen-capture (OBS) Open Broadcaster Studio. Both are excellent open source applications.
I second Avidemux, if you need batch processing then Virtualdub is good but you will need to download some extra files for H264 (MP4, MKV) support.