Sure, if you want to spend the money to add (more) redundant links. You want to front a few thousand dollars?
Unless you mean that digital links aren't more vulnerable to radiation, in which case I recommend you read up on large-scale analog circuitry and get back to me.
Wait for SpaceX or somebody else to bring the per-kg cost down and we'll have all the digital video anyone could ever want.
You seem to be arguing rad-resistance is the factor that made them decide on analog instead of digital video.
I doubt it.
Like someone said, initially they chose analog because back in the day nobody did digital video streaming. It has worked okay since then. And there just hasn't been enough reasons to justify a change to digital.