The UCC DTV channels are currently on 474MHz and 594MHz mux frequencies. As long as the tuner embedded in that TV is a DVB-T2 tunner, then you should be able to pick up some FTA channels in and around Kampala
It looks like you are picking the pay-TV channels and not the UCC Free-To-Air channels. The mux frequency for those unscrambled channels should be 474000kHz. MOZIKI, STV and the other channels you are seeing are on GoTV/Star network frequencies (674000 and 490000 KHz).
A couple of questions for you:
– What DVB-T2 receiver are using i.e. Model/Make? Can you manually set the multiplexes?
– What specific area are you tuning from?
– Are you using and indoor or outdoor Antenna?