WEBVTT
Valid cue size values.

1
00:00:00.000 --> 00:00:30.500 size:100%
Bear is Coming!!!!!
Box for the cue is 100% of the video viewport width,
exemplified through background color,
even if the text needs less.

2
00:00:31.000 --> 00:01:00.500 size:10.6%
I said Bear is coming!!!!
Box for the cue is 10.6% of the video viewport width, which will mean that automatic line wrapping will happen.

3
00:01:01.000 --> 00:02:00.500 size:0%
I said Bear is coming now!!!!
Cue text box size of 0 is acceptable, even if not visible.