1938 directed by Joseph Kane starring Gene Autry, Smiley Burnette, Joan Valerie, Sammy McKim, Ivan Miller, Earl Dwire and Hooper Atchley with the Stafford Sisters, the Maple City Four, Walt Shrum and his Colorado Hillbillies and a guest appearance by Roy Rogers. Gene and his boys ride into town to set up a barn dance and a horse sale. However, most of the ranchers have recently purchased new tractors and have no need for horses. Meanwhile, Sally, the manager of the struggling, local radio station, convinces Gene and his boys to sign on for a regular show, omitting to tell him that the station'
You can stream Old Barn Dance (Gene Autry) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.