If it's a criticism of the video in isolation, then that holds merit. It sounded to me like it was a criticism of his technique and how he does things. That he acknowledged that as a mistake to rectify makes it less valid as a critique of that as long as he actually changes.

The person I was replying to asked for a specific example, I provided one. I still like his content, still subscribe, and have watch most of his videos since. Seems like some people are just taking this as a "hate on Vertasium" post.