I am a new ubuntu 20.04 user; posting the outputs from a related question

$lspci -knn | grep -A3 -Ei "3d|video|vga"

00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:9a78] (rev 01)

    DeviceName: To Be Filled by O.E.M.
    Subsystem: Dell Device [1028:0a25]
    Kernel driver in use: i915

$vainfo

libva info: VA-API version 1.7.0

libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so

libva info: va_openDriver() returns -1
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so

libva info: va_openDriver() returns -1

vaInitialize failed with error code -1 (unknown libva error),exit

I am not sure how to fix this, could someone please assist, thank you.

You have to install both packages by

sudo apt-add-repository universe # optional - OP was able to install w/o this command
sudo apt-get update
sudo apt-get install i965-va-driver intel-media-va-driver

and then run vainfo again.