Shaka Player supports trick play, a rewind/fast-forward style of seeking. Trick play is supported through the {@link shaka.player.Player} method setPlaybackRate. The setPlaybackRate method should always be used instead of setting video.playbackRate directly as video.playbackRate does not support rewind (on any browser we have tested). Standard playback rate is 1 and paused is 0. To rewind, use a negative playback rate. To fast-forward, use a positive playback rate greater than 1.
var video = document.getElementById('video');
var player = new shaka.player.Player(video);
// Fast-Forward (2x).
player.setPlaybackRate(2);
// Rewind (-2x).
player.setPlaybackRate(-2);
See {@link https://goo.gl/X0bdwe control.js} for a fully functional sample implementation.