scale insect video- see them moving around?

Do "U" know the most critical factor to check for in kashrus?

The most critical factor to check for in kashrus? is "Bedikas- Toloi'yim".

Does the Rav Hamachshir or their Representative know the hands-on practical knowledge of "bedikas toloi'yim"?

They must know thoroughly  at least; a) identification of the various common insects in fruits & vegetables, b) good eyesight, c) how to use a light box, d) patience, e) how to use a shmatah bedika, f) etc.

Where was the Mashgiach trained / tested etc? ?
יראת שמים