The Internet Archive hosts millons of videos, movies, and cartoons, besides books, of course. 
Free to watch/download, without making an account.
Here are some collections of vintage TV, watchable on their pages if you get wifi, and downloadable as files if you don't.
https://archive.org/details/classic_tv
...has sub collections organized by decade, and also miscellaneous treasures.
https://archive.org/details/saturdaymorningcartoons
...has cartoons!
Much of the content is not as well catalogued, so use search on the whole site if you need something specific, for example:
https://archive.org/search?query=rocky+bullwinkle
There are also collections of vintage films, but most of those will be easier to get through usual streaming apps.
Best wishes as you begin this next part of your journey.
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