On
NASA TV there is a series of streams to pick from.
One of the streams is the
Space Station Views stream, supposedly showing the activity from the ISS in real time. It doesn't work always but I remember watching it a few times a while back (it was very boring, of course, and it
never offered a glimpse of space like I hoped) but as I remember it showed scenery from the inside of the station for spans way longer than 20 seconds.
As I said, judging from the reactions and interactions between the
actornauts (<--- yes yes I just invented this, and you're welcome to use it!

) they feel "real" enough videos (at least to my less experienced eyes). Let's not forget that it must be a tedious long process to create credible footage with special effects, say transforming gravity acting into non-gravity acting, and they did use to offer lots of
hours of such footage from the ISS.
I am very open to the idea that magic tricks, not visible to my naive eyes, are being used by these david copperfileds to create non-gravity footage:
but couldn't it be that they do have an orbiter just to offer credible film in absence of gravity? They probably did with Apollo, no? Let's not forget the compartmentalization that may require even some of the scientists to be conned into believing the ISS or the Shuttle are really up there.
*
BTW,
the old Apollo "stars" argument is still valid with the ISS, and I think it is an important one, albeit for absence of clues rather than for presence.
We are explained that the stars are not visible if the camera is filming the earth because of the luminosity. Very well.
But is it conceivable that, out of curiosity, never in twenty more years they felt like
turning the camera outwards, maybe during one of the passages in the dark,
to show us what must be a breath-taking show of billions of stars shining on?
Think about it:
you are in space and there is no atmosphere between you and the stars. That would be a never-before-seen memorable event. Any of us would have the immediate impulse and curiosity to look into space and report back the incredible impression, that nowhere on earth, not even in remote areas of Chile, can be experienced.
And yet, the silence about the stars, once again and like with Apollo, is deafening.