It appears the issue you are seeing is from the Intel HD Graphics. Are you able to reproduce the issue using a blu-ray player with the same movie/show?
I don't know if that i5 could handle it but you could try installing MadVR to help with that shading issue. It is very resource intensive and only a dedicated Graphics card is able to handle the highest settings for MadVR.
Denon AVR-3311CI, Denon DVP-602CI, B&K EX4420, B&K TX4430, Belkin PF60
Sony BDP-S5000ES, Silverstone HTPC (6 Tuner DVR & 10 TB Media)
PSB Stratus Minis, PSB Stratus C6, PSB Alpha S surround, James Subwoofer EMB-1200
Sharp LC-70LE755U, Harmony 880 Remote