Where can you watch the original 1983 animated series He-Man and the Masters of the Universe online for free? Full episodes and movies are available on YouTube via the official MOTU channel.
Not only does the YouTube channel include original He-Man and the Masters of the Universe, it also has full episodes of the 1990 series The New Adventures of He-Man and the original 1985 series She-Ra: Princess of Power.
He-Man and the Masters of the Universe
She-Ra: Princess of Power
The New Adventures of He-Man