New issue by ericonr on void-packages repository

https://github.com/void-linux/void-packages/issues/34051

Description:
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### System

* xuname: x86_64-musl
* package: gstreamer-vaapi-1.18.4_1 or gstreamer-vaapi-1.18.5_1 from #33997

### Expected behavior

Video plays normally.

### Actual behavior

Video is flashing, has completely wrong colors, and seems to drag in textures from the rest of the webpage.

![image](https://user-images.githubusercontent.com/34201958/141604297-58592538-d8b0-450a-82fc-06828e1cde69.png)

### Steps to reproduce the behavior

Launch a YouTube with Epiphany.