I don't know if anyone else has this collection, but Something Weird Video released videos some years back called HEY FOLKS, IT'S INTERMISSION TIME! In each collection, there are numerous Christmas trailers/come-ons/bumpers that used to be shown before and in between features at theaters. Some of them include Rosemary Clooney (and many other entertainers) for Easter Seals and local ads for upcoming Christmas shows/celebrations at theaters. There's usually ads wishing everyone a Merry Christmas and Happy New Year's, etc. The music during some of these are cool too. And of course, you'll find other gems too -- such as the legendary "Let's All Go To The Lobby" dancing snacks trailer and many countdown clocks/animated scenes. Many of these come from the 40s-70s, btw.
The copies I have are six vhs tapes, but SWV sells them on dvd-r now. Each recording runs between 90m and 120m typically. They're fun to watch but after one viewing they can become tedious to sit and focus on. The videos make for good background sound/images too.