Video playback speed does not appear to be working

[davidrs]

When setting up a new task I sued the reference task/layout for video classification.
I edit the layout <video... tag to increase playback speed, but it has no effect on the playback:

<View>
  <Video name="video" value="$video" defaultPlaybackSpeed="4" minPlaybackSpeed="4" />
</View>

I'm on Chrome.
Expected behaviour from docs: https://labelstud.io/tags/video#Parameters

[defaultPlaybackSpeed]	number	1	default playback speed the player should start with when loaded
[minPlaybackSpeed]	number	1	minimum allowed playback speed; defaultPlaybackSpeed cannot be set below this value