Video Snapshot v2.0.0
An extension for minimalists (or just me).
Usage:
Step 1: Press `Cmd-Opt-S` to display a snapshot of a video on YouTube.
The image is in the WebP format which requires less disk space than PNG.
Step 2: Save the image.
Right click or drag-drop with your favorite image downloader.
Step 3: Click anywhere to dismiss the snapshot.
Source code: https://github.com/Domon/video-snapshot