(Note: There is also a 2024 American road-trip/crime film titled "Silver Star" starring Grace Van Dien, but your "2022" tag matches the Dutch horse-themed film.)
The string of letters and numbers describes the quality and source of the video:
Stars Dutch equestrian and media personality Britt Dekker (as Megan) and Wendy Ruijfrok (as Esmee).
Originally in Dutch, though "MULTi" in the filename suggests it includes multiple audio tracks (likely English and Dutch).
The text you provided is a standard file naming convention for a high-definition movie release. Based on that string,
A sequel to the 2019 film Whitestar , it follows 16-year-old Esmee , who forms an intense bond with a young horse named Silverstar after saving him from a barn fire. When she discovers suspicious activity at the stables and realizes Silverstar is in danger, she runs away with the horse into the wild to protect him. Key Details: Genre: Family, Adventure, Drama. Director: Diede in 't Veld.