On a small width screen, the first video stretched instead of cropped when playing it for the first time

[rogierhofboer]

Describe the bug
On a small width screen, the first video stretched instead of cropped when playing it for the first time

To Reproduce
Steps to reproduce the behaviour:

1. https://codepen.io/rogierhofboer/pen/NWQNNvb
2. Make your browser screen width as small as possible.
3. Refresh the browser (CTRL-R)
4. The video is stretched
5. Refresh the browser again (CTLR-R)
6. Press next button
7. Press prev button
8. The video is cropped.

Expected behaviour
The video is cropped, like the next one, and when playing the first one for the second time.

Screenshots
First time (stretched):

Second time (cropped):

OS / Browser
Happens in Chrome on Windows and in the Android Chrome Webview