It doesn't sound like it's revving too high in the second video. All mine make that note.
1st video, which is the choke position you refer to? The lower revs with the lever forward or when you pulled it backwards?
The lower revs as shown are certainly not the normal full throttle level. The higher revs sounds right for full throttle.

Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!