Those were mostly too pathetically retarded to be funny. D:
SA2 was vaguely amusing because of the shippers though.
The "SA2 in a Nutshell" link you posted is actually mislabelled: that is, in fact, just "Sonic Adventure 2 2 minute edition" as the sound clip itself states (and is actually funny without the flash movie lol). "Sonic Adventure 2 in a Nutshell" is a totally different thing (also not funny), presumably by the same guy who did "Dragonball Z in a Nutshell" etc.