Frozen Fever has shown on Disney Channel. I'm not sure how long after the initial release it was though. As for Olaf's Frozen Adventure, another sign that it was intended for TV - it was done in 16:9 and didn't fill the wider (2.39:1 ???) theater screens. Personally, Coco was pretty long itself, so I don't get the complaints about the extra 21 minutes. Heavens, I saw Gettysburg in the theaters when I was 10 and that was FOUR AND A HALF HOURS (huge history nerd growing up). I think the real issue for many folks was it delayed the start of Coco from 17 minutes (previews) to 38 minutes and a lot of Coco fans were not particularly fond of Frozen.