I’m crazy busy today, so I haven’t had much time to make with the content. Might I instead point you towards the The Film Crew‘s take on Killers From Space, available for free via youtube? Shout! Factory actually has quite a number of shows freely available, including the entire brief run of the precursor to Rifftrax.
(I realize that embedding is disabled, I really recommend clicking through – it’s definitely worth it. They also have some Elvira hosted horror movies available, if that’s more to your mood.)