+Themes have some programmatic control over video playback. In particular,
+if you want to make a video start from the beginning, you can do::
+
+ video:rewind()
+
+which will instantly make it start from the first frame again. This can be
+useful if you e.g. want the video to start when you're switching to it,
+or if you're not really using it to loop (e.g. as a transition marker).
+
+You can also change its rate, e.g. by::
+
+ video:change_rate(2.0)
+
+This will make it play at twice its usual speed. Your rate should not be
+negative nor exactly zero. You can set a rate to e.g. 1e-6 if you want to
+in practice stop the video; once you change it back to normal speed,
+the next frame will resume playing. Be aware that changing the rate may
+make the audio behave unpredictably; there are no attempts to do time
+stretching or change the pitch accordingly.
+
+Finally, if you want to forcibly abort the playing of a video,
+even one that is blocking on I/O, you can use (since Nageru 1.7.2)::
+
+ video:disconnect()
+
+This is particularly useful when dealing with network streams, as FFmpeg does not
+always properly detect if the connection has been lost. See :ref:`menus`
+for a way to expose such functionality to the operator.
+