SLR Video review icons

This script allows users to review SLR videos and classify them into selected playlists.
Each reviewed video will display an icon matching the selected playlist.
A "Toggle visibility" button can hide/show already reviewed videos.

By default, the playlists describe male orgasm positions: "standing", "sitting", "lying-down", "no-orgasm" and "multiple". Playlists titles need to exactly match the id of the related SVG icons.

More info at: https://forum.sexlikereal.com/d/6856-mark-videos-as-not-interested