Below are the full videos of every Christmas specials I could find. Not the songs, best parts, or opening themes, the whole episodes. I don't even know as I type this how many I can find, but I'll give it a go! This will save you the time and effort of finding the shows on TV or on video.
1. Rudolph the Red-Nosed Reindeer (1964, Rankin-Bass)
2. Jack Frost (1979, Rankin-Bass)
3. Year Without a Santa Claus (1974, Rankin-Bass) Part I
4. Year Without a Santa Claus (1974, Rankin-Bass) Part II
5. Frosty the Snowman & Frosty Returns (1968, 1992, Rankin-Bass/Lorne Michaels)
6. Yes, Viriginia, There is a Santa Claus (1974, Bill Melendez)
Those are the biggies I could find. I could only find bits and pieces (or Spanish language versions) of Santa Claus is Coming to Town and the original A Charlie Brown Christmas. There are lots of others, but these are--to me--the quintessential Christmas specials of my childhood. Hope you enjoyed 'em! In the next couple of weeks, I'll be posting numerous Holiday Cheer posts on the blog, so be on the lookout. Happy Monday, and Merry Christmas!