Thank you for your suggestion.

I'm afraid that isn't a good solution for my $ituation (see the details in my above replay to Karl),
all technological curing solutions have been exhausted to the extent of my knowledge,
so I'm aiming lower than solving/bypassing the problem as a whole, and focusing on what I think I can do.
Regarding the multiple viewers issue, there isn't an issue, as such a scenario is extremely rare (very different tastes -> rare shared viewing), and everyone got their own device, so watching the original version separately is always an option.

Thank you.