Failed to set the 'currentTime' property

[ashbrowning]

When specifying the time as a CustomVideoTime (ie, 'middle'), the error TypeError: Failed to set the 'currentTime' property on 'HTMLMediaElement': The provided double value is non-finite. is thrown.

The cause of this seems to be that video.currentTime is NaN. A quick bit of digging suggests that awaiting for the onloadedmetadata event on the video element before obtaining the current time might solve it.