I get the following message when attempting to play a video file that was downloaded from YouTube:
video/x-gst-fourcc-av01 decoder needs to be downloaded by parole media player.
I have searched through the Web but have found no solution. I have
ubuntu-restricted-extras installed and all the codecs as well. Despite all this, the video cannot be played in Parole or VLC.
My environment is Xubuntu 18.04 LTS.