Now adopted as Chrome extension. Link: https://tinyurl.com/y6j8nwxg
This is a safari download extension that I created during my working days in XunLei Thunder Inc.
It sniffers out all the downloadable links inside a standard webpage (not including paid or custom video services: Youtube, Youku etc.) and creates a downloadable thunder:// link for it.
Best used when paired with the Mac Thunder application.