Currently you are able to watch "Vinland Saga" streaming on Netflix, Netflix basic with Ads, Crunchyroll, Amazon Prime Video, HiDive or for free with ads on Crunchyroll. It is also possible to buy "Vinland Saga" as download on Apple TV.
Vinland Saga is available to watch for free today. If you are in Canada, you can:
For a thousand years, the Vikings have made quite a name and reputation for themselves as the strongest families with a thirst for violence. Thorfinn, the son of one of the Vikings' greatest warriors, spends his boyhood in a battlefield enhancing his skills in his adventure to redeem his most-desired revenge after his father was murdered.