You have a generous interpretation that would be the same if he had one or two files.
What he said " can not check if all are overage in the videos because there are many videos," was that he wasn't even going to bother looking at all of them to see if there were obvious underage since there were too many videos.
Granted, he also said he finds it difficult to recognize age in non-Asians, which is valid.
It's still, don't post stuff here that you haven't even looked at. I just spent a couple of hours going through a large picture file where I deleted more than a fifth for being duplicates or off-topic.