I think I saw part of it in the after school program I was in at the time that it was released on VHS. I only have really a vague memory of it. It's not one of the more known adaptations of the King Arthur stories.
I know about Quest for Camelot from an ad in either Disney Adventures or Nickelodeon Magazine and from the tie-in Sing-Along VHS, which included We're Off To See The Wizard from The Wizard Of Oz which was another tie-in to WB's Special Edition version that was released that same year.
That's a forgotten 90's animated film, WB thought they could give Disney a run for it's money; they lost big time. Came in 3rd the weekend it was released with Deep Impact at 1st and The Horse Whisperer 2nd. The movie almost made 40M which was the film's budget, so WB lost over 200M on this film.