By the way, the video actually mixes up comparisons like these at least a couple of times. The pic above is one of them, where ray-tracing is enabled, but the caption says it's disabled. I haven't gone through and double-checked everything, but 13:55 is another example.
Regarding the differences being small, I'd content that the video does a bit of a disservice in some ways by mostly focusing on a stable camera and world, or picking things where the comparison against no-raytracing doesn't completely fall apart (the shot of the hotline phone is, ironically, a fairly bland example to use throughout, imo, but w/e).
Cases like these below start to become slightly more interesting, because, the reflections in the TVs are always correct, and other methods wouldn't be able to hold up in the same way.
As well, there are a lot of other incidental details that static shots may not show very well, just because it's hard to eye-ball how much of the scene actually is reflecting the world. By and large it's not something that is a radical gamechanger, where you HAVE to spend the equivalent of this game's price fifteen times over because it's impossible to play it any other way...but it is a very nice addition.
