Assuming all these assumptions are correct, here's a review:
This indicates the source material. It means the file was encoded from a physical Blu-ray disc, ensuring the highest possible starting quality. bastilleday20161080p10bitbluray8chx265h
This signifies Full High Definition (1920 x 1080 pixels). It is the standard for high-quality viewing on most modern monitors and televisions. Assuming all these assumptions are correct, here's a