I can't find any credits for this excellent documentary (link) on the Mexican-American War other than
'Uploaded on Jan 2, 2010 KERA-TV dallas/Fort Worth'
so I have to guess that KERA-TV produced it but if there's information in the film itself, I didn't find it - no writers, producers, actors (some scenes are dramatized), or directors. If anyone from KERA-TV sees this post and can send me this information, I'd be happy to add it.
I'm posting it because Americans seem to have conveniently forgotten how the Mexican-American War began and what we gained and Mexico lost from it.
There are 9 sections to it but they transition automatically from one to the next.