I watched the Thanksgiving video again. I think it's genuine. The narrator sounds too authentic for the dubbing to be fake. I also think this really was made for Thanksgiving, as the narrator says "celebration" and "Thanksgiving" multiple times, and the boys are wearing Christmas sweaters at the beginning of the story.
For the second go-around with your thoughts in mind, I definitely can tell how bad the music is. It's a little distracting, actually, when you're paying attention to it.
I was trying to research Children's Productions and came up nothing much, except that this was really made by a company called Instructional Films Inc., and Children's Productions seems to be an offshoot of that company. (Maybe a different department?) The reason I was looking was I had the thought that maybe the mother is a nun in real life and that's why she looked so stern
Well, I don't have any confirmation on that, sorry.
There are a couple postings on archive.org of this video, and I'm surprised at the harsh criticism that this gets. Maybe I shouldn't be surprised, but I didn't think it was really all that bad. It could be because I'm so used to this era of production.
I did notice how cute as a button that little girl is the second time around. She's really hamming it up. The littlest boy looks familiar, too. I wonder what became of these people in this video. I hope they had nice lives.