With apologises for the delay in response.
Clarification needed, do you actually mean pictures or recordings?
If recordings then…
I’ve just tested streaming from a FVP 4000T and 5000T and the ‘skip’ buttons appear to be working, amount of skip depends on what you are streaming, ie SD/HD and the duration of the recording.
You can either use the dedicated buttons on the H3 remote or use the on screen graphic, highlight the direction you want to skip and press OK.
Try a reset of the H3?