If you have not come across RiscFF before it is a RISC OS GUI Front end for the RISC OS version of FFmpeg - a set of command line tools for handing video and audio files.
RISCOSbits have relaunched their scheme to allow you to update your Pi 4 system to one of their systems (Pi Harder, PiRO Noir, FOURtress and PiAno machines).
Stefan joined the WROCC June meeting to talk about Cloverleaf CLFiler. There is a commercial version and a free demo version (which does not include search).