weev is a loon. he's a real neo nazi now; has a swastika tattoo on his chest and is an admin of the daily stormer.
however, he also possesses some technical skills and in this particular video, the point he makes about ethereum's language is correct. he's wrong about the developers making a mistake in coding the DAO (none of the ethereum devs had anything to do with theDAO's code), but everything else is valid. theDAO's downfall had everything to do with solidity, the language.