Halo TV Series premiere episode is free at YouTube
Probably you might read about the mixed reaction from gamers and Halo fans about the creative freedom that Paramount Pictures took with Halo TV Series and by all purpose, not relating too much as we knew the in-game lore.
Nevertheless, Paramount feels confident enough that at long term, the show will be given more positive and mixed reactions at the end that the 1st episode is completely free...