I will have a guess at the question!-
"Last Month"- Capture date- might be found by a Smart Collection.
"five stars, video files," might be found with the Attribute Filter (on the FIlter bar [ \ ] )
Regards. My System: Lr-Classic 12.3 Photoshop 24.5, ACR 15.3.1, Lightroom 6.3.1, Lr-iOS 8.0.8, Bridge 13.0.3, Windows-11.