Computerphile

Arduino

7th - College | Online video/YouTube An introduction to Arduino, its hardware, and hobbyist programming.
Topic: Arduino

Computer Vision: Filters (Blur, Edge Detection etc) - YouTube

7th - College | Online video/YouTube Learn how computers find the edges of things in an image, and how they blur and filter images.
Topic: Computer Vision

Cryptography

High School - College | Online video/YouTube Series of videos covering encryption, cryptography, hashing algorithms, key exchanges, password cracking, and more, with a strong focus on the mathematics behind these topics.
Topic: Cryptography

Logic Gates

7th - College | Online video/YouTube Covers And, Or, Not, and XOR gates, and how computer memory works.
Topic: Logic Gates

Neural Networks

High School - College | Online video/YouTube Set of videos covering neural networks and deep learning.
Topic: Neural Networks

Triangles and Pixels

7th - College | Online video/YouTube Computer Graphics Series with John Chapman discussing how any shape can be most easily simulated with a set of triangles, and how those get translated to pixels on a computer screen.
Topic: Computer Animation

Virtual Reality

7th - College | Online video/YouTube Computerphile visits Germany and meets lots of scientists working on VR projects, giving a good overview of the technology.
Topic: Virtual Reality (VR)