Datavyu 1.5.1-RC2 Resizing video window makes it turn all black

[jperricone]

Describe the bug
The video window turns all black upon resizing. At some sizes, the video returns; at others, it's back to black.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Add Data' and add a video
2. Resize the video window

Expected behavior
The video should resize with black space padding it.

Desktop (please complete the following information):

• OS: mojave 10.14.4