How to tweak Jellyfin’s player controls animation timeout

I have been using Jellyfin as my main media player more and more lately. I’ve always been a fan of VLC and its compact-ness, but I found a some pluses in Jellyfin over VLC. However, there are things that bother me with Jellyfin as well. One of them is the playback controls which simply take way too long to disappear when not used.

How to stop Jellyfin from logging to system log

By default, Jellyfin on CentOS logs to the main system log. This isn’t an issue except in odd instances, like for example when part of library is located on a remote network attached storage that isn’t permanently available.
This makes Jellyfin log thousands of lines of warnings when (re)scanning the libraries and hits the missing media locations which in turn causes lfd to send out alerts about the syslog getting flooded.