Pirates on Horseback
Starring William Boyd, Russell Hayden, Andy Clyde, Eleanor Stewart, Morris Ankrum, William Haade, Dennis Moore, Henry Hall, Britt Wood, Silver Tip Baker
It's a western and action & adventure movie, and has a rating of 6.3 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Belgium.