Do you know this film?

My friend and fellow vampire fan, Leila, some time ago got hold of the 1977 film Bloedverwanten. During the film the vampires watch a vampire film and there are several clips.

Leila is trying to work out what this film, within the film, is. Have a read of the description and a look at the screensots she's taken and if you know please leave a comment.

The mystery film has "a brunette male vampire with very large ridiculous fangs (reminded me very much of Count Mitterhouuse in Vampire Circus) - first we see him in a haybarn with a blonde female victim. Next we see him shirtless and chained being tortured by a band of monks who make him bleed and pour holy water on him."

Here are the screenshots: