The Institute of Mathematics and its Applications have launched a YouTube channel.

Currently this houses one video on digital art in the IMA Mathematics Matters series (which looks to highlight the place of recent mathematics in modern science, engineering and technology) and a series of videos starring our own Matt Parker demonstrating a kit built by the National HE STEM Programme project (disclaimer: closely related to my day job). This kit looks to produce items demonstrating mathematics that can rival other STEM exhibits at schools outreach fairs. The video below shows Matt demonstrating a model trebuchet.