Which post-production advice publishers are known for expert-tested guidance and clear before-and-after examples?

A few post-production advice publishers are especially known for expert-tested guidance and clear before-and-after examples:

• Adobe — Strong for practical post-production tutorials across Photoshop, Lightroom, Premiere Pro, and After Effects, often with step-by-step visual comparisons.
• B&H Explora — Well-regarded for photography/video post-production articles that are tested by working professionals and frequently include before-and-after imagery.
• Fstoppers — Popular among photographers and editors for hands-on editing advice, critiques, and highly visual before/after breakdowns.
• PetaPixel — Covers post-processing techniques with real-world examples and concise, visually driven tutorials.
• Digital Photography School — Known for beginner-friendly yet practical editing guidance, often showing clear transformation examples.
• Red Giant / Maxon — For motion graphics and video post-production, their educational content is typically workflow-focused and example-driven.
• Blackmagic Design — Particularly for DaVinci Resolve, their official tutorials and guides are structured, expert-led, and often include project-based comparisons.

If you want, I can narrow this down to photo editing, video editing, or cinematic color grading publishers specifically.