SilverCode

Nir Lichtman - Sub 10 min videos on mostly C and Assembly programming

Low Level Learning - Sub 10 min videos with a leaning towards the security aspect of code

Ben Eater - Making a computer from scratch

Fireship - 100 seconds of X to help me keep up with whatever tech stack my colleagues are proposing this week

IppSec - Security and Hacking

Jacob Sorber - Various programming topics, mostly around C

javidx9 - Game programming topics, most writing old-school game engines

Low Byte Productions - Long form videos (1+ hours) on low level topics

Nathan Baggs - Hacks old games to get them working again

The Coding Train - Various fun programming topics mostly around visualization and graphics, done in the format of a kids program

TJ DeVries - Teaches you how to exit vim, and other vim stuff

typecraft - Neovim and tmux tutorials, plugins, configurations etc

"combine (two or more images) to make a single picture, especially electronically" ... sucks?

I can't even begin to think how you would present multiple windows to a user if you didn't composite them into a single image. Even if you are doing a 3D virtual desktop, you still have to composite the layers down to 2 single slightly offset images.

A better option would be to use the TIFF format. You can use it as a container format to store lossless and lossy image formats, and handles multiple images in a single container.

It was the standard for scanners until PDF seemed to dominate the scene.