Nageru is playing from, causing it to automatically rewind before the end of
the segment.
+Videos are assigned an arbitrary signal number when loaded. Whenever you need
+to refer to this signal number (say, to get its width or height for display),
+you should use *video:get_signal_num()*. Like any other signal, videos have
+a width and height, an interlaced flag (currently always false), a frame rate
+(which can vary during playback) and has_signal/is_connected member functions.
+The former is always true, but the former will be false if the video isn't
+currently playing for whatever reason (e.g., the file is corrupted, or a network
+stream is broken and hasn't reconnected yet).
+
Controlling video playback
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