Watch the footage in chunks instead of one long sitting. I did the same thing with the JFK assassination tapes and by hour four your brain just turns to mush and you stop noticing details. Take notes on specific things like the flag moving, the shadows, the camera angles, then go back and check those moments again later. The stuff that looks weird at first usually has a boring explanation once you slow down. Sixty hours of raw footage is way too much to absorb at once, your eyes glaze over and you miss the actual context. Pick maybe two or three things that bug you the most and dig into just those.