Videos that stood out to me

How to choose your Aperture (James Popsys)
Why you shouldn't always go for extremely low or high aperture numbers.
Choosing the RIGHT LENS — Why Focal Length MATTERS (Jamie Windsor)
Impressive demonstration of the psychological effect of different focal lengths, comparing photography to cinema.
Can You Bracket AND Focus Stack for Perfectly Exposed & Razor Sharp Landscape Photos?! (Mark Denney)
How to bracket and focus stack at the same time, but of course also useful for learning how to do either one by itself. Includes concrete demonstration of processing steps in Photoshop.

The Photography Skill nobody likes to hear... (James Popsys)
Spoiler: It's patience and curiosity. This video talks about how to arrive at more interesting pictures, particularly at locations where every direction is already an exciting view.
7 PHOTOGRAPHY MISTAKES I see all the time (Nigel Danson)
Great overview of what compositional aspects to watch out for to make your images look better.
Create Powerful LANDSCAPE COMPOSITIONS with this Easy On-Location Workflow (Mark Denney)
How to look out for elements, shapes, light, and distractions while finding a good image composition, demonstrated on one of his own shoots photographing a waterfall.
One Hour, One Lens. (James Popsys)
Highlights from an hour of walking around an old English town in search for photo opportunities. Includes a great example of photo stitching to get a wider angle of view.

How I EDIT my PHOTOS in Lightroom. The basics... (James Popsys)
A walkthrough of landscape/nature photo editing that emphasizes the why rather than the how, so it's useful even if you don't edit using Lightroom.
7 BEGINNER Steps to EDIT BETTER Landscape PHOTOS in Lightroom (Mark Denney)
Another perspective on landscape photo editing, giving a step-by-step guide.
Controlling Colour in your Photography (Hue, Saturation and Luminance) (Sean Tucker)
Thorough yet very accessible overview on how to make conscious artistic choices regarding color.

Macro photography ideas to shoot at home (COOPH)
Shows how to make a DIY flash diffusor from a Pringles tube and shows some incredibly creative examples of macro shots at home.
5 Tips: How to Start Macro Photography at Home! (Kai W)
A bit more on the technical side: which lens and setup to use?
Complete Macro Photography Tutorial for Beginners (Spencer Cox)
Another great tutorial focusing more on insects and flowers, but also giving lots of useful technical advice.

What are all the TYPES of Street Photography you can do? (Omar Gonzalez)
Great overview of different kinds of photo "genres" that can be subsumed under "street photography".
My Street Photography Process (with Contact Sheets) (Sean Tucker)
Sean goes through a full day of contact sheets, i.e. the full & unfiltered set of pictures taken during one day of street photography, explaining his ideas and philosophy and why he did what he did.
My Street Photography Philosophy (in Rome with the Fujifilm X-T20) (Sean Tucker)
More great insights from Sean Tucker, this time giving a more philosophical perspective.
10 Street Photography Tips - The Photography Show 2020 (Brian Lloyd Duckett)
Ten general tips from an experienced, professional street photographer.
Introduction to Street Photography (Brian Lloyd Duckett)
More in-depth overview of the genre, discussing different approaches, sub-genres, and technical tips.

Shooting Portraits with One Speedlight (Sean Tucker)
Thorough demonstration of how to shoot professional-looking portraits on a budget, using a single speedlight, an umbrella softbox, and a foldable background.