I understand why they are in there. I am able to watch the videos now.
My point is simply that within the isolation of slides, they serve no purpose and a person may waste some time trying to note the TINY difference that may (or not) exist, and which is usually of no real value. Thus, these extra slides I've pointed out (and many others I didn't) serve to slow us down and, IMHO, should be removed.
moderator: I may get to this. Admittedly probably not, as the challenges themselves need fixing which is more important, but updating the slides should be possible. Uncertain. Sorry if we don't get to updating them!