The videos are of screenwriter Jonathan Nolan and physicist Kip Thorne discussing the science of the film Interstellar (2014) in a Q&A session with Sean Carroll, at NASA's Jet Propulsion Laboratory, in Pasadena, California. The videos have been submitted to the website Unlisted Videos (unlistedvideos.com), a site for making unlisted YouTube videos easier to find.
One of the best and most inspiring movies of all time in my book. Would've been a solid 11/10 if it had not been for the 5/7 ending and all that "love transcends time" mumbojumbo. The physics was mostly on point, which made it all the more epic.
Also I read an article which said that apparently the black hole was soo accurate in the movie that Astrophysicists actually used it to gain new insight into how black holes work.