If you were thinking about checking out the Paramount+ Halo TV series, the first episode is airing this week (starting March 31) on YouTube for US viewers. This teaser is one way for the provider to entice viewers to check out the show and subscribe to the service. Paramount has done this with Star Trek: Picard before.
Here in Canada, though, you can already check out the show on Paramount+ Canada. The series debuted on the service the same day it did in the US on March 24.