Based on her page, showing dogs being boiled alive, I think vegan isnt perhaps the best description for that content. A vegan channel is someone showing how to make salads.
Eg, vegan channel showing animal cruelty should be marked as showing 'animal cruelty (newsworthy)' and advertisers should be able to say they do/don't want to advertise on the 'animal cruelty (newsworthy)' tag.
A big game hunting company might not want to advertise on that tag. Nor would a children's toy manufacturer. Fine.
But the RSPCA, an environmentalist politician, or The Body Shop might want to advertise and if I was a vegan I might want to give them my money.
> A vegan channel is someone showing how to make salads.
I can see that's the most common case, but check out for example /r/vegan - it's mostly content about vegan ethics.