Watch Excalibur (1981) HD Full Movie Free on SolarMovie. Watch Excalibur (1981) online free. Merlin the magician helps Arthur Pendragon unite the Britons around the Round Table of Camelot, even...Merlin the magician helps Arthur Pendragon unite the Britons around the Round Table of Camelot, even as dark forces conspire to tear it apart.