Comment 59 for bug 1964547

Still having issues with the latest nightly on my end. Running 101.0a1 (2022-04-05) and I see a small increase in video decode usage (using Intel GPU Top) when the [Big Buck Bunny video](https://www.youtube.com/watch?v=aqz-KE-bpKQ) loads (using 4k vp9 which is supported by my Tiger Lake laptop) but then it goes back to zero immediately and there's no further acceleration.

In the console, the following lines repeat themselves multiple times when the Youtube page is loaded:
```
libva info: VA-API version 1.13.0
libva info: User environment variable requested driver 'iHD'
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_13
libva info: va_openDriver() returns 0
```
Looks like it is loading Vaapi properly but still not getting processed by the GPU.