I agree we should be careful when viewing cctv I found the same when I went looking for the two persons mentioned in your footer.
There were 4 people in Heworth Road and Heworth Place on the evening of 18th March:
One was the Person who walked up Heworth Place and Back to Heworth Road-Dark Person
One was the person who crosses Heworth Place as Dark Person walks down Heworth Place to Heworth Road-Light Person
One hides in the doorway of The Limes reception-Limes Person
One Is situated behind the wall of Heworth Cottage, The corner house on Heworth Road and Place-Cottage person. The CCTV was poor quality and not enhanced and there were many timestamps missing.