On one of my Youview recorders I use a mini wireless keyboard. It makes entering searches far easier and also one of the keyboard buttons goes straight to the recording list.
1. You could use the Humax remote app, tablet and phone versions available for android and ios, however I have found that connection can be iffy, not just to the 4000T but other Humax units as well.
2. I took the wireless dongle and keyboard from a PC (already paired obviously) plugged the dongle into side usb port on 4000T and it works.
3. A wired keyboard plugged into side usb also works.
I wonder if it has all the other YouView accessibility features. There was an accessibility update about six months after launch, to meet the accessibility requirements imposed by the BBC Trust as a condition of BBC participation. And indeed YouView seem to have gone the extra mile, not just done the bare minimum. http://www.dtg.org.uk/news/news.html?id=4946
It would be interesting to know more about the FVP-4000T’s accessibility features (if there’s any more to know). And is it part of the FP spec or down to Humax.