An engineer at the throttle of a locomotive speeding through a tunnel sees the lights of a train approaching from the other end. Although the signals say the track is clear, he still sees the train's lights. He grinds the train to a halt, derailing it. He survives, but many passengers are killed. He is fired in disgrace, but sets out to prove his innocence by finding the "phantom express." File Format is 640x480 1500mbps Window Media Video
You can stream The Phantom Express (1932) free and legally on OldReel, via the Internet Archive.
Yes — it is in the public domain and can be watched and shared freely.