Updated to MC 8.6.5 today. Sequence that played perfectly last night with 8.6.4 crashes MC today with error message -
Video compression not recognized
[/Snapshots/relengmini1_1479270374/coresw/ame/src/msm/DIDReader.c:4766]
No other changes to system. Running OS 10.12.1
No clues found yet toward a resolution.