Given Alba Zevon's history with "bondage" and "UltraGirl" (often involving ties and restraints), the "Red Cow Milker" scene probably incorporates heavy bondage, such as strapping the model into a milking stand or livestock crush, as is common in the hucow genre.
The text you're referring to, "hucows 24 09 21 alba zevon red cow milker xxx 1 exclusive," is typically a metadata string used to categorize adult content, specifically an adult film or scene featuring performer Alba Zevon Context and Origin hucows 24 09 21 alba zevon red cow milker xxx 1 exclusive