Pretty sure the birthday thing
already is obvious. Has been for some 3+ years now - for
at least as long as my Samsung Galaxy phone keeps generating this kind of stuff out of random photos in my gallery, on its own, every couple days. Google Photos has effectively been doing the same thing for much longer, too.
I mean, all those auto-composed photo slideshows universally suck; you've seen a couple (per vendor), you've seen them all. Easiest way to tell - music. Second easiest way - goofy title, some photos don't match the purported theme.
As for the prospectus video - that I suspect would fly, and will fly for many years to come, because whether it works depends entirely on how well this guy can sell it. Being able to talk off skimming the summary of the Cliff's Notes of a book, without the teacher realizing you didn't read the actual thing, is a skill people tend to master in high school.