John Howard Payne (Henry B. Walthall) leaves home and begins a career in the theater. Despite encouragement from his mother and his sweetheart (Lillian Gish), Payne begins to lead a life of dissolute habits, and this soon leads to ruin and misery. In deep despair, he thinks of better days, and writes a song that later provides inspiration to several others in their own times of need.
You can stream Home, Sweet Home (1914) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.