There is something I don't understand. If our connection cannot support HD quality, it's not our choice anymore, we cannot "choose" to make it better.
For instance, I chose to pay 10 euros more per month (much more than vikipass) to have VDSL. Because I have a gamer in my household, who plays online games while I watch my series, with the results that you imagine. Now we are happily doing each his/her own thing, he plays and I watch in HD without bothering each other.
With the exception of people who could see a certain episode in HD in other sites but not here - something which has yet to be explained - for the rest of us, the majority of users, the difference is a problem at the source (our end) rather than this or that site.