[SOLVED] Troublesome playback (GST/PepperAPI related)

SOLUTION: Change default sound output (if on pulseaudio) to another one and back

I'm having a weird problem related to media playback:
Every video that I try to play (be it mp4 and etc.) including flash (even html5 at times) tries to run at more than 3 times of its usual playback speed, with it getting rid of sound as well.

I tried reinstalling the packages to no avail. Persists on reboots.

What do?
I don't even know where to begin posting outputs, so I'll just be with:

$ uname -r
4.0.1-1-ARCH