Build a demo library
Paste links to YouTube videos and the demo organises them into a small library. It then queues them with the same algorithm the full app uses, run in your browser through Python.
One link per line. Ten to thirty links give the algorithm enough variety to be worth watching. Reading a link's title contacts YouTube from your browser. Nothing is downloaded.
Coming back? If you exported this demo's data as a file before, you can restore it.
Play through YouTube?
Songs in this demo play through YouTube's official embedded player. Loading it contacts YouTube, which sets its own cookies and may show ads. The demo does not remove either, and your storage choice here does not cover them. Nothing is requested from YouTube until you accept.
The full Harmonica plays your own files instead.
Up next
The order comes from the real algorithm. Rate and skip and the next queue shifts. Nothing is banned, an over-played song just comes up less often.
Algorithm settings
These are real controls over the real algorithm, the same knobs the full app exposes in its Settings. Changes are saved at once and shape the next queue.
The full app goes further, with controls the demo has no material for, such as video priority, favourite pacing, per-factor rating weights and rating normalisation.
Your demo library (0 songs)
Metadata is the song list, ratings are your stars, settings are your storage choice and algorithm tuning. Importing a file adds what it holds and never deletes anything.