Complex sentence: A unconfirmed account claims that Courtney was not told until just before the broadcast that MTV2 did not have the rights to air those movies and Performance, which had an X rating, could not have aired on that channel regardless.
Split into simpler sentences: A unconfirmed account claims that Courtney was not told until just before the broadcast that MTV2 did not have the rights to air those movies. And the film Performance had an X rating which meant it could not have aired on that channel regardless.