I don't want to sound to pretentious, but:
I have said these things before on here about her, so i'm just going to quote the main points, that you and others can probably see already.
[#1] "She is afraid of the long lasting societal repercussions and maybe her family and friends views of her."
[#2] "she's very lazy and to an extent reclusive."
[#3] "her dignity is for sale but she wants more money than offered for it."
You probably already know the 720p quality is an excuse and a blatant lie. (see quote: [#1] & [#2] these two are feeding each other, that's why she won't fix it.) but all 3 of these behaviours can and do feed each other too, this is her character.
So if people want her to go further, you would need to brake down [#1]
discourage [#2]. by encouraging her to take positive action,
and for [#3], you can try to convince, or tell her that it's too high, or she can make more in the long run with lower prices.