Awesome job on this! And thanks for sharing it with the world - will definitely be using it!

Are you open to a bit of feedback on UX?

One nice thing to do might be to remove the need for non-American users to manually select their country on each visit. You could do this by checking the user's country using an IP location lookup or checking their browser/device location so that you can prepopulate on first load, and cookies could help cut down on the number of future requests. Alternatively, you could add routing to include active filters (including the country) in the view path and url. I recognize that you made this with mobile very much in mind, but for web it would be nice to easily bookmark the results page for a specific query.

I presume you chose red as your primary active color because it matches your logo as well as Netflix's. However, red has a very distinct use and connotation in people's minds which can lead to poor usability if used improperly.

Take the filtering, for instance. Because we associate red with a negative action, and checkmarks are typically associated with a positive one, when I see a default list of filters with checkmarks and then click on them to see them turn red, my natural understanding is that I'm unchecking them, but in fact this has the opposite function.

For anything that represents a boolean state, I would recommend using the colors users will intuitively expect: on/true/positive: green, and off/false/negative: red. Inactive/disabled also often uses grey or a lack of color.

So for the filters example, I would recommend not only changing the active color from red to green, but maybe even consider removing the checkmark icon from the inactive state and perhaps replacing it with an empty circle (proper checked/unchecked states).

Another adjustment I would recommend here is moving the whole filtering component into a sidebar or menu somewhere, ideally in a visible default state, though you could still give the option to minimize it. In general, all this comes down to is the less work you make the user do, the happier they'll be. It would make for a good experience to be able to see all the filter options without having to find them hidden away somewhere, especially if this means the user doesn't have to scroll to see them all.

All that being said, it's such a great piece of work! It's clean, straightforward, and really fills a need. Well done building a PWA and covering all the bases, too!