Evolution of the Spanish Language: 001 Basic Principles (Repost with corrections)

I have been made aware of some errors in my original version of this video:
1)  I confused the idea of cases and declensions in my discussion of the Classical Latin nominative system. (6:43)
2)  I got some of the inflections wrong in that same example.
3)  The text I used to exemplify Classical Latin was not as high-register as it could have been, so I switched it with a different example.  I hope this one is better.  (8:29)
4)  I have been informed that some of the Eastern Romance languages retain some vestige of the Classical Latin case system.  Since I don't know enough about the grammar of those languages, I did not make any alterations to my video related to that.

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