[IngoBlechschmid]

I love Matt Parker's take on the fourth dimension: see for instance this one-hour long but very enjoyable talk for general audiences at the Royal Institution: https://www.youtube.com/watch?v=1wAaI_6b9JE (Things to See and Hear in the Fourth Dimension)

If you know German, then you might like this talk as well: https://www.youtube.com/watch?v=d19zmiVBLS8 (The curious world of four-dimensional geometry)