The voice is that of Dick Van Dyke. The song is Chaplin's Smile, sung by Barbara Streisand. The footage and Van Dyke recording is from Stan Laurel's funeral in 1965, at the Forest Lawn-Hollywood Hills Cemetery in Los Angeles.
The video was produced by http://www.lettersfromstan.com/ , a Laurel and Hardy fan group.
Stan's longtime onscreen partner, Oliver Hardy, passed away in 1957. The duo started their cinematic careers separately in the silent era, and were paired on screen by Hal Roach.
Stan Laurel wrote his own epitaph: "If anyone at my funeral has a long face, I'll never speak to him again."
Stan, you're still speaking to all of us through your wonderful films.