I got the JP blurays for this, only to find out the video quality on them is terrible!
The Fansub release is actually better, despite being at a much lower bit rate, as it attempts to correct some of the issues present in the Blu-ray video…
Source: HAIBANE-FANS/CTR Fansub
Avg. Video Bit Rate: 4.62 Mbps
derpanime List’s File/Stream Details: