PitchLoop
URL params: v (video ID), start / end (e.g. 1m30s or 1:23), speed (0.25–4), preserve (true/false), loop (true/false).
URL params: v (video ID), start / end (e.g. 1m30s or 1:23), speed (0.25–4), preserve (true/false), loop (true/false).