This release includes Koyomimonogatari Blu-ray Episodes along the audio commentaries that came with the Blu-rays/DVDs and it's translation.
Encoded to 10-Bit (x264) to reserve space while maintaining quality.

Source: Balwant from Hi10 via Sajamba(Subs Fixed by Balwant)
Audio Commentary Translation: r/araragi - maxdefolsch & ValanL

Since Hi10's release was OCed, I have rejoined the parts and muxed everything together into one file for each episode.
The result is a great balance of 'quality/file size' with two audio tracks (Original + Commentary), and two subtitle tracks (Sajamba Subs + Commentary via maxdefolsch & ValanL)