NYT is 11mb, wapo is 22, scrolling down once on reddit is like 40mb.
100 and something mb doesn't warrant pre-warning for a page specifically promising animations.
Then I made one where I realised it really needed some rather big videos for illustration. It ended up being 43MiB and... After thinking about it for a while I decided that was fine. The few people interested in my work are unlikely to even notice the download.