From the post of @Tids in the link:
GStreamer 0.10 has been unmaintained for quite a while,  and some CVEs have accumulated.  The last release was in 2012. Applications should use GStreamer 1 now.
With this update, my system installed the package GStreamer 0.10 from AUR:
[PACMAN] Running ‘pacman --color auto -U /tmp/yaourt-tmp-tomasfl/PKGDEST.WGf/gstreamer0.10-0.10.36-11-x86_64.pkg.tar.xz’
[ALPM] transaction started
[ALPM] upgraded gstreamer0.10 (0.10.36-4 -> 0.10.36-11)
[2017-01-31 20:13] [ALPM] transaction completed
Now i have 2 gstreamer packages:
pacman -Qi gstreamer
Nombre : gstreamer
Versión : 1.10.2-1
pacman -Qi gstreamer0.10
Nombre : gstreamer0.10
Versión : 0.10.36-11
Requerido por : gstreamer0.10-base
I didn’t know what package installed gstreamer0.10. I can delete gstreamer0.10 without affect my system?