Was filmed, having been sorted out by tests (8)
I believe the answer is:
screened
'sorted out by tests' is the definition.
'screened' can be an answer for 'sorted' ('screen' can be a synonym of 'sort'). I'm unsure of the 'out by tests' bit.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for screened that I've seen before include "Involved in selection process" , "Tested for disease or infection" , "Not viewable" , "shown on TV" , "Subjected to checks" .)