Because he seems to compare this game to other titles like (and using his exact list) "DayZ, H1Z1, Rust & ARK" in-structure to F:76, he uses this as justification for breaks in series tradition.
Couple exceptions are brought in things like PvP, where he brings up how it will effect the player base, where others such as a lack of, or very minimal story telling in those games aren't brought up here.
- No NPCs - He identifies the series prior had an emphasis on NPCs/choice, "But when you stop thinking of Fallout 76 as a Fallout-game, and think of it as an MMOFPS", stating you can't have world-changing stories in that genre, and can only really have in a singleplayer game. Outside the mention of having quest-giving signpost characters, and flavour-text background dressing, he brings up the setting as another reason why there's no human NPCs "...because humans are meant to be scarce, and instead of NPCs, you get a bunch of corpses who have little recordings on them, and you get to figure out what their story is based on those recordings."
- Dead body recordings - He doesn't understand why people do not like this approach of story telling, saying it's more streamlined to pick up a recording and keep playing through the stage, instead of exhausting dialogue options with that character. "...I think if it were any other game,people wouldn't care; we've seen this so many times in other games, and its always been fine"
- Character progression/card system - Brings up how others find the system weird, but how he personally likes it. Gushes about how much customisation the card system gives you
He does admit at the start that the game has underlying issues that the community brought up vocally (mainly bugs, latency, etc), while emphasising he's only played a couple hours of the game numerous times in the video.
Despite this, as well as admitting the game will have at minimal a shitty first month, he doesn't think it'll be DOA; while not thinking first impressions will leave a stigma on the audience, yet still buys these styles of games day 1 anyway despite telling others not to