I'm unable to retrieve the link to his tweets at this time (mobile) but the author of the article has said that IH has not reached out to either him or mentalfloss.

IH also did not communicate about him reuploading a new version. The author was told of this by the many people emailing him following Hbomb's exposé.

The author has not, to my knowledge, said anything about his following steps, but I assume they will have to at least decide on whether to issue another DMCA for the reupload.

I do hope he, and they (mentalfloss) decide to pursue further legal action. IH's actions are uconscionable, and a precedent has already been set with the taking down of the first video. The second video is by far not enough of a transformative work that it would shield him from the same thing happening again.