The basic relativistic effects referred to in Interstellar are real, like time dilation. So in principle a planet orbiting near a black hole could have that sort of time effect that you see in the movie. But the entire premise of the movie and most of the delivery of it make no sense. Of course, for speculative things like the wormhole and whatever, it is almost impossible to say it is inaccurate because in all likelihood such things do not exist.

I am sure that the visualization of the black hole is mostly accurate, which is what the video from OP is originally talking about. I mean, no one has ever gone to look at a black hole, but in the case of a black hole we know what it is and have more or less exact equations that you could use to make simulated graphics like this for a movie.

The premise of the movie is: (1) (Former NASA pilot) Man's daughter sees weird behavior of dust in her room (2) Weird dust behavior "traced to a gravitational anomaly at a NASA facility" (whatever that means) (3) Man goes to NASA facility and finds out that for 48 years they have been "watching a wormhole on the far side of Saturn to another galaxy near its black hole" (just think about how insane this premise is (4) Due to "muh climate change" the NASA scientists determined that a more likely survival scenario is to fly humans to Saturn to traverse the wormhole to another galaxy to look for inhabitable planets (again, consider how ridiculous this premise is) because they cannot solve their "magic gravity equation to save humanity" unless they can "see a black hole singularity" (5)The search party found 3 contenders and NASA wants Man to lead a team to go check up on them (6) Team traverses wormhole and subset goes to first planet which is so close the black hole the Lorentz factor is 1 hour : 22 years (or whatever) (7) Team lands on this planet with no problem but is hit by a tidal wave, making it take an hour to get off, then simply returns to the ship (8) Team goes to next planet but Matt Damon is a secret villain who betrayed humanity (9) Team survives and the only way home is a gravitational slingshot around the black hole where Man (and one of the robots) sacrifice themselves to the black hole "in order to save weight" (10) Man falls into the black hole and the robot takes all sorts of important data (11) Inside the black hole Man is in a tesseract looking at himself and his daughter in the past (12) Man is able to tap out the data from inside the black hole to his daughter in the past so that when she grows up she will have the data to solve the "magic gravity equation and save humanity" (13) Now that its purpose to save humanity is fulfilled, the black hole tesseract collapses out of existence (14) The black hole returns Man to his home planet of earth, where his (now elderly) daughter has saved humanity with the "magic gravity equation."

Sorry about all that. But anyway, it should be clear why this is totally ridiculous, even by Hollywood standards. What they are talking about with this post are that the visualizations are mathematically consistent with GR.

The basic relativistic effects referred to in Interstellar are real, like time dilation. So in principle a planet orbiting near a black hole could have that sort of time effect that you see in the movie. But the entire premise of the movie and most of the delivery of it make no sense. Of course, for speculative things like the wormhole and whatever, it is almost impossible to say it is inaccurate because in all likelihood such things do not exist.

I am sure that the visualization of the black hole is mostly accurate, which is what the video from OP is originally talking about. I mean, no one has ever gone to look at a black hole, but in the case of a black hole we know what it is and have more or less exact equations that you could use to make simulated graphics like this for a movie.

The premise of the movie is: (1) (Former NASA pilot) Man's daughter sees weird behavior of dust in her room (2) Weird dust behavior traced to a "gravitational anomaly at a NASA facility" (3) Man goes to NASA facility and finds out that for 48 years they have been "watching a wormhole on the far side of Saturn to another galaxy near its black hole" (just think about how insane this premise is (4) Due to "muh climate change" the NASA scientists determined that a more likely survival scenario is to fly humans to Saturn to traverse the wormhole to another galaxy to look for inhabitable planets (again, consider how ridiculous this premise is) because they cannot solve their "magic gravity equation to save humanity" unless they can "see a black hole singularity" (5)The search party found 3 contenders and NASA wants Man to lead a team to go check up on them (6) Team traverses wormhole and subset goes to first planet which is so close the black hole the Lorentz factor is 1 hour : 22 years (or whatever) (7) Team lands on this planet with no problem but is hit by a tidal wave, making it take an hour to get off, then simply returns to the ship (8) Team goes to next planet but Matt Damon is a secret villain who betrayed humanity (9) Team survives and the only way home is a gravitational slingshot around the black hole where Man (and one of the robots) sacrifice themselves to the black hole "in order to save weight" (10) Man falls into the black hole and the robot takes all sorts of important data (11) Inside the black hole Man is in a tesseract looking at himself and his daughter in the past (12) Man is able to tap out the data from inside the black hole to his daughter in the past so that when she grows up she will have the data to solve the "magic gravity equation and save humanity" (13) Now that its purpose to save humanity is fulfilled, the black hole tesseract collapses out of existence (14) The black hole returns Man to his home planet of earth, where his (now elderly) daughter has saved humanity with the "magic gravity equation."

Sorry about all that. But anyway, it should be clear why this is totally ridiculous, even by Hollywood standards. What they are talking about with this post are that the visualizations are mathematically consistent with GR.