Article's here:
https://gizmodo.com/doctor-who-an-unearthly-child-streaming-stef-coburn-1850933733

But the initial 4 episodes of Doctor Who will not be on the BBC streaming archive due to the son of the writer, Stef Coburn, revoking rights. 10 years ago, he tried to claim he owned the rights to the tardis, which obviously didn't pan out. Guy seems fairly unhinged...

Hopefully you've got copies. Otherwise, if you want to see it, piracy ahoy! (Though, really, aside from Unearthly Child [which his father only cowrote], the rest of the serial is pretty skippable, though not as bad as some people claim...)

--Sweetie Belle

Stef Coburn is a racist arsehole.

7893355
I've got a copy on DVD. I just hope the rights are sorted out so that this can eventually make it onto Blu-Ray.