Two things can happen if a Dark Souls newbie watches this video. One, they are gullible and go 'wow that truly is One Weird Trick to becoming good at Dark Souls'—meaning they're likely to dedicate the rest of the playthrough to trying to find a coconut.
Or two, they catch on that all of the stuff about fruits is complete nonsense. Hopefully it's not the first, because Matt Lees is obviously not being serious here—and it's hilarious.
Dark Souls: The Main Reason New Players Give Up [Matt Lees]