Fullmetal Alchemist is a popular Japanese anime series that has gained a massive following worldwide. The series follows the story of two brothers, Edward and Alphonse Elric, who are on a quest to restore their bodies after a failed attempt to bring their mother back to life using alchemy.

Crunchyroll offers Fullmetal Alchemist: Brotherhood for free with advertisements. You do not need to pay or risk malware. The video quality is excellent, and subtitles are accurate.