Cheers Mic!
Ended up with these
Select all video fade ins:
tell application id "com.figure53.QLab.5" to tell front workspace
set selected to (cues whose q type is "fade" and q type of cue target is "video" and (opacity is greater than opacity of cue target)) as list
end tell
Select all video fade outs:
tell application id "com.figure53.QLab.5" to tell front workspace
set selected to (cues whose q type is "fade" and q type of cue target is "video" and (opacity is equal to opacity of cue target)) as list
end tell