11 April 2016
Amazonsaurus has a 45 minute documentary that tells all about the dinosaur from discovery to description and beyond. The only problem with it is that the entire documentary is in, I am fairly confident but would be willing to admit that I was wrong, Brazilian Portuguese. The first half of the documentary is shown below. The second half is linked from the first on YouTube and after the first half ends.
Non-Portuguese speakers have a more limited choice of documentaries that they can both watch and fully understand. These are shorter and less informational. They include entries like the one below. Though not an actual documentary, it affords some information that can be used, if one can escape the robot voice without turning it off.