Is there a dedicated feed for watched movies?

There’s not a public feed for movies and TV, but there probably should be. Until then, I can tell you how our Epilogue app works around this.

We use the Micropub API and pass ?q=source&filter=themoviedb.org. This will return all of your blog posts that have a link to themoviedb.org, which Micro.blog includes by default in movie and TV posts. In that JSON response, there’s also a microblog-thumbnail field that has a URL to the movie poster.

Micropub needs an Authorization header with a Micro.blog token, so it’s not a good fit if this is in public JS for your blog that anyone can read.

Another option is you could create a “Movies” category on your blog, then add a Micro.blog filter (Categories → Edit Filters) that automatically assigns posts that contain a emoji to that category. Then each category will have a public RSS or JSON Feed.