When I was younger we used to watch several Disney animated shorts during the Christmas break, including Mickey’s Christmas carol, Donald Duck’s Christmas, one with Pluto and Chip and Dale, and Goofy in the art of skiing. We were looking for them at the library without much luck, but then I looked on YouTube and found them all.
I also found Frosty the Snowman in three separate parts. The only one I haven’t found yet is the original version of Rudolph the red-nosed Reindeer and the land of misfits. I loved the gold digger, especially when he tossed up his ice pick, then picked it up and licked it to check for gold.
Update: Drat. I hadn’t tried watching the Pluto’s Christmas Tree all the way through until just now, and realized that it’s cut short. I haven’t found another one (yet).