Framepress
A file you drop never leaves the browser.
An X post or an archive.org video. The link is fetched so the browser can open it. A file you drop stays on this device.
Paste an archive.org link to enable Load tracks.
Words sit on the clip. A still you add replaces it. With no picture, a found cover is used, then the analyzer.
Hear the lyrics decodes the soundtrack into timed lines you can sing and download as SRT. A hosted listener is used when one is configured; otherwise a listener downloads once and stays on this device. The MP4 is still made here.
Karaoke follows the words, so the export keeps enough frames for the line to move. Still and Smooth stay off.