1) "Smoke On The Railways"
2) "Walking In The Orchard"
3) "Moonlight Waterfall"
These movies can probably be found in the Toobworld Netflix along with "The Monster That Devoured Cleveland" ('Dobie Gillis'), "Hansel And Regrettal" and "First-Born of Godzilla" (both from 'M*A*S*H'), Ginger Grant's "Sing A Song Of Sing Sing" ('Gilligan's Island'), and "Veil Of The Desert" which originally starred Mark LeMartin ('My Favorite Martian'). (I would have included "Rambo 6" from 'Alien Nation', but the way things are going, Stallone might get around to making that one!)
I've seen "Manos". Trust me, not even the MST3K treatment could make that worth your time!
Sometimes those real movies are absorbed into the TV Universe - like the 'Star Trek' franchise and the 1966 'Batman'. Other times they can be a hindrance, like with 'Star Wars' - it's a movie to most Toobworld denizens, but it's also part of the TV Universe in which they live. And still other times they can provide the splainin needed to wipe away such problems (as with the Peter Cushing versions of "Doctor Who".)