What I meant was that each universe shows the particular iteration of that universe's characters. Really, they should have just left it alone or use a clever shot to make sure it looks nothing like the version from the film. I'm positive Oa, the Lanterns and the Guardians will look nothing like that in the show, Imagine if there was a steaming Batman show coming out and they had shown a clip of Gotham from The Dark Knight Trilogy. It's not the streaming Batman show until it is, so it would be recognized as the film incarnation. We also shouldn't judge continuity by quality.
Nothing solid indicates that it is the tv show. Anyone who has said it is without any official confirmation should wait until we know for sure.
A correct description for the time being would be "a universe that appears to be where the Green Lantern film takes place. Time will tell if this ends up being for the HBO show."