Here is a Christmas special which I haven’t seen since I was about 6 or 7. It’s “The Christmas Messenger” starring Richard Chamberlain, and narrated by David Essex. The special is a series of animated vignettes which recite Christmas carols as poetry, with some live action too featuring Richard Chamberlain as a mysterious stranger appearing in a Victorian village, listening to Christmas carols while speaking cryptically.
The animation is pure early-to-mid 70s; lots of mystical imagery – like a Yes album.
Merry Christmas!