You used to be able to stream A Charlie Brown Thanksgiving on YouTube, but Apple TV Plus has acquired the rights to the famed Peanuts specials. Therefore, Nov. 23-27, you can stream it for free on Apple TV Plus. There are some clips available on YouTube, but nothing beats watching the movie in its entirety.
And since it was originally a TV special, it won’t take more than a half hour of your day to watch the sulky Blockhead and his merry band of misfits celebrate what is a favorite holiday for so many.
Source: https://www.distractify.com/p/how-to-stream-a-charlie-brown-thanksgiving