Guides
These articles describe the form that is live today. They do not add a download engine.
How to copy a video URL
Get the address itself, not the caption around it.
How video links work
Short links, watch pages, and parameters that ride along.
URL checks and common mistakes
The messages the form can show, and what they mean.
Video formats and quality
What quality labels mean before any file exists.
Copyright and permitted downloads
Permission comes before any future download button.