[High Praise! to Mental Floss]
If you’ve ever wondered why this abomination exists, all is explained at the link above.
And yes, the full, high quality version of the movie in question is available for viewing at the link.
And no, there is no reason to sit through the whole thing. Not even morbid curiosity.
Although I admit to having done it twice in my lifetime.
BONUS LINK:
The Dark Side: An Oral History of ‘The Star Wars Holiday Special’
Wherein people associated with the production of SWHS reminisce.
[Think you have a link that’s IMAO-worthy? Send it to harvolson@gmail.com. If I use your link, you will receive High Praise! (assuming you remember to put your name in the email)

Well, to be fair, Christmas tried to ruin science fiction first, with “Santa Claus Conquers The Martians.” So I’d say it’s a draw.
Anyway, what’s Lucas’s excuse for this piece of ____? Greed, inattention, carelessness, stupidity, or greed again? Occum, all ye faithful.
Can’t blame him at all. Were I in his shoes, I wouldn’t have turned down another mansion in return for a stupid TV special. Just don’t pretend afterward that the franchise means more to you than mere money.
… i.e., when the remaining Beatles sold “Revolution” to Nike, they lost their claim to being above selling themselves out.
“On the Sith day of Christmas my true love gave to me . . . ”
A Death Star Fidelis
(O Lethal Star of Bethlehem)