Block-Heads with Stan Laurel and Oliver Hardy. Stan and Ollie are doughboys together in WWI. When the rest of the platoon is to charge forward, Stan is given orders to stay and guard the trench. He stays at his post for the next twenty years until he is discovered and returned to the States. When Ollie discovers that Stan has returned he fetches his old friend from the Soldiers' Home and brings him home. Several dozen sight gags later the movie ends.
In this scene, after Stan has tried to light the oven and failed (but left the gas on), Ollie has gone to light the oven himself.