First video shows he touched a few things. Perhaps fingerprints off those? Those clothes would mark that guy depending on locale. Perhaps other cameras saw him

First video shows he touched a few things. Perhaps fingerprints off those? Those clothes would mark that guy depending on locale. Perhaps other cameras saw him as well? Also, now you know your camera isn’t doing the best, add other camera(s) where it would have helped. Eg to capture face-on angle as you approach door. Consider upping the resolution of the cameras you add. On a more general note, rethink about how this guy found your place as a suitable target. Mitigate what you can. He knew he had plenty of time. And he seemed quite comfortable being there.