Rename video-related modules to be media-related (#50)

* Added test from before that I forgor

* Renamed video-related modules to media

config/test.exs

@@ -3,7 +3,7 @@ import Config
 config :pinchflat,
   # Specifying backend data here makes mocking and local testing SUPER easy
   yt_dlp_executable: Path.join([File.cwd!(), "/test/support/scripts/yt-dlp-mocks/repeater.sh"]),
-  media_directory: Path.join([System.tmp_dir!(), "test", "videos"]),
+  media_directory: Path.join([System.tmp_dir!(), "test", "media"]),
   metadata_directory: Path.join([System.tmp_dir!(), "test", "metadata"]),
   tmpfile_directory: Path.join([System.tmp_dir!(), "test", "tmpfiles"]),
   file_watcher_poll_interval: 50