A young Cajun boy named Alexander Napolean Ulysses Latour (Joseph Boudreaux) spends his time on a Louisiana bayou. There he plays, fishes and hunts, worrying only about the alligators which infest its waters. The boy's innocent routine changes forever when his father (Lionel Le Blanc) signs a lease agreement with an oil company which brings a derrick into their corner of the bayou.
You can stream Louisiana Story (1948) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.