Check the bundled mappings.
This page runs local checks against the same dataset and matcher as the main HRP website. It does not test a live YouTube layout.
Try the page badges
Open NDTV — hover the km badge at the bottom right ↗Open NDTV on YouTube — then choose a video ↗Open an unsupported website — toolbar popup should show no match ↗After rebuilding, reload the extension in chrome://extensions and refresh existing website tabs.