Using mixed resolution, detail upscaling and a flow data based video and audio codec you could get some pretty decent results at very low bit rates.
This could enable further advancing of the public broadcast spectrum use.
1 mb HDR 720p UHF VHF
3.2 mb HDR 2K
8.2 mb HDR 8K
at whatever frame rate the tv allows.
This could also be a time to upgrade the transmitters.
48Kb next gen Dab 24bit 96KHz HD High clarity audio.
48Kb Dab TV 360p visual 28Kb HD Audio 20kb.
next gen MW video and just audio at 6.2Kb 240p.
Down to.
2.2Kb 22KHz 12bit Audio over multi threaded long wave radio burps using multiple Antenna and overlapping multi range and pickup variation search and signal packet modulation to enhance the signal over LW.
These AI enhanced very low data rate codecs could also allow for a more cost effective rural internet technology.