I don't get your point - the BBC is providing the content on both IP-based and DVB-based solutions - so the maximum number of people can watch. If they just provided it via broadband then those who don't have broadband (either for financial or practical reasons) would be excluded. If they just provided it via DVB, then those with just broadband would be excluded.
Back in 2016 I mentioned that during my childhood years I used to record any BBC and ITV schools programmes that appeared to be potentially interesting to watch at home. I also mentioned that, in the era before YouTube, I thought that there should have been a dedicated TV channel to show some of the schools programmes in after school hours and at weekends when more kids were available to watch them.
https://tvforum.uk/forums/post994138#post-994138
It resulted in a huge barrage of criticism.
A particularly caustic comment came from dbl
“I know people who are teachers and what you're suggesting in general is rather bizarre.”
I have previously worked as a teacher but dbl didn't appear to consider this possibility before coming out with their comment.
Another caustic comment came from bilky asko
“Children's educational programmes are hardly high culture. The sort of people who want their children to become cultured and intellectual aren't going to be sitting them in front of the TV in order to become that way.”
He utterly fails to realise that there are plenty of high quality educational videos around if he knows where to look. Did he even consider the possibility that the sort of parents who wanted their children to become cultured and intellectual back in the 1980s and 90s encouraged them to watch certain schools programmes at home?
Putting everything together raises the question at exactly what point in time did it become socially acceptable, or even normal, for kids to watch videos (regardless of where they originated from) relating to school subjects at home rather than at school? I was probably part of a minority of kids to watch schools programmes at home, although I know for sure that I was far from unique, but nowadays it's commonplace (and completely normal!!!) for kids to watch YouTube videos relating to school subjects at home in order to help with homework or revision for exams.
The BBC and ITV companies have shown 'soft' educational programmes as part of their repertoire of children's programmes for decades, but they never included anything directly relating to the school curriculum. BBC Learning Zone was created in 1997, but it was not specifically intended to deliver programmes for children to watch at home any more than the old BBC schools of the 1980s was. In 1998 BBC Bitesize was launched as a resource to specifically help children with schoolwork and revision for exams, despite only around 10% of families with school age children having the internet at home.
It's possible that Bitesize then later YouTube were game changers, but I can't help thinking that the most prominent factor is that parents, and even kids themselves, are more concerned and serious about education than their predecessors from the 1980s were.