Intel VAAPI: Playing video with Totem freezes the system

In Tails 3.6.1 User gets system frozen when playing an MKV video in totem with a graphic card:

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) (prog-if 00 [VGA controller])

User claims this problem does not happen in Debian.
In Tails Troubleshooting mode, videos work, although slow.
Videos worked fine in Tails 3.5.

intrigeri: i’ll forward you the (full) log.
Bug report: 63f7ce65e89a8e86d1695510d07bc137

Feature Branch: bugfix/15433-GNOME-settings-vs-VA-API

Related issues

• Related to #15842 (closed)
• Blocked by #15433 (closed)
• Blocks #13245 (closed)

Original created by @emmapeel on 15449 (Redmine)