Several YouTube videos are not rendered properly for example https://www.youtube.com/watch?v=mbBiA0ldnqU. The videos are rendered with a solid background color (green, magenta...) and some distorted text belonging to the YouTube webpage. Audio plays nicely though I found bug 201422 which was fixed in the past, perhaps it's a similar issue. Also there is bug 173796. I mention it because I've seen issues playing videos in WebKitGtk when libav is being used.
BTW I'm using Debian's 2.34.6.
I suspect this is another gst-vaapi-related issue...
(In reply to Philippe Normand from comment #2) > I suspect this is another gst-vaapi-related issue... Uninstalling it makes the video work properly indeed...
Sergio, can you paste the output of vainfo?
Created attachment 456552 [details] vainfo output
I confirm this bug Arch Linux Epiphany 42.2 WebKit 2.36.1 on Wayland (EGL). Intel® HD Graphics 620 (KBL GT2). Please fix it. It is very frustrating. Thank you.
Created attachment 458235 [details] screenshot epiphany on youtube
This is not a WebKit bug. For the time being, uninstall gstreamer-vaapi. There is a new gst va plugin in development, if you want to try it: 1. `gst-inspect-1.0 va` should display the plugin informations. If it's not the case, find the packages for your distro, this plugin is in gst-plugins-bad currently. 2. Set this env var: GST_PLUGIN_FEATURE_RANK=vah264dec:MAX before running epiphany.