This setup allows you to stream pirated movies and series with a clean UI. You can search for movies in a IMDB-like database, save them to watch later using the library feature, add subtitles, select streaming quality, and the extension syncs with your Stremio account, so you only need to install it once and it works across all your devices. I suspect this might get shut down soon due to legal pressure. MagisTV offers live TV, sports, and more, so the pressure from corporations is even greater.
Of course, if your ISP monitors you for pirated content, you could get into trouble if you don't use a VPN. However, in my country, it's not a big deal since a lot of people use torrents. Piracy is likely more common in South America compared to the US or Europe.