[kamens]

Fun idea!

Building on that: there's a common children's magic trick involving a flip book that magically "colors" its pages (https://www.magicinc.net/products/fun-magic-coloring-book?va...)

It works by moving your thumb to a different position while flipping the pages -- every Xth page is cut at slightly different lengths, so when you move your thumb to the next position, different pages become visible during the flip

Using this trick you could show multiple different video clips in the flipbook just by moving your thumb to a different spot

[waltbosz]

I love that magic trick, but wouldn't that significantly thicken the cardstock flipbook ?

[kristopolous]

would it? I assume the trick is the sheets are slightly trapezoidal. Shouldn't that be enough?

Of course you're doubling the page count regardless of the approach ... that's likely unavoidable.