There's this Youtube creator I watch: Cracking the Cryptic.
They started with doing Cryptic Crosswords, but expanded into doing Sudoku puzzles. Then during the lockdown, the sudoku really took off, so much so they went from one video a day (featuring Simon solving) to two puzzles a day (the other being Mark solving). And from that point on, it's been at LEAST two videos a day, and actually a lot more these days.
Just sudoku? Just putting in numbers in a 9x9 grid? Well yes, that's the basic grid, but they are really into crafted variant sudoku. (Most sudokus that appear in newspapers are computer generated ones.) These ones are specially made, often have a great break in, and then a smooth ride through solving. And as for basic...
There are cages, where the digits add to a total. A 'v' or 'x' between cells mean they add to 5 or 10. There are lines; purple lines are renbans where numbers are consecutive, in any order; thermo lines increase in one direction; region sum lines break the lines into equal sums; arrows, diagonals, chess based rules (no digits a knights/kings moves away)...
There are spots outside the grid that give sandwich sums, skyscraper clues, little killer lines. This can mean that the grid itself can be entirely empty...
9x9? Grids can go down to 4x4 or over 11x11.
Recently they have been getting back into cryptics with weekly videos about the Friday puzzle. And on the Patreon they do the Times Monthly Special and... I've heard of those of those words... one or two. Yes, they have a Patreon, where $2 gets you extra videos and monthly puzzles, and $3 for the solutions to those. Mark also does Connections and Gridograms...
And also daily videos of Wordle, and Minute Cryptic...
They do a lot, is the point, and if you enjoy good puzzles and seeing how to solve them, this is a great channel to follow.