: Using a .rar format, as your query suggests, is a standard method to compress video files to save storage space and bandwidth, though pre-compressed video formats (like MP4) may see limited further reduction . How I Use Movie Clips In My Videos - Fair Use
Preparation of Digital Movie Clips for Online Journal Publication | AJR
: Using movie clips without permission is often defended under "Fair Use," which considers the purpose of the use (e.g., commentary or criticism) and whether it is "transformative" .
: The American Journal of Roentgenology (AJR) provides a detailed guide on preparing digital movie clips for online publication, focusing on optimal frame rates (10–30 fps) and compression codecs like MPEG or QuickTime to manage file size .
For professional or academic purposes, "movie clips" are defined by their technical specifications.