This isn't a video, so I don't know if this will help, but there is a book called "One Hundred Ways to Get to 100" by Jerry Pallotta. We bought it for my son when he was 4 or so, but he seemed to pick up the concepts between the time we bought the book and the time it arrived in the mail! Anyway, it shows skip counting by 1s, 2s, 4s, 5s, 10s, 20s, 25s, and 50s; has some addition and subtraction facts that equal 100; has some very basic multiplication facts based on the skip countin; has some very basic division problems; and is loaded with bright pictures on each page to illustrate the ideas. To me, it looks like a very useful book. HTH!
