Several user-uploaded files exist, including high-definition MKV versions with multiple subtitle tracks.
Use the "Torrent" option if available. Because these files are large (sometimes 8GB for a 1080p restoration), torrenting distributes the load and is encouraged by the Archive.
Related search suggestions: Young Frankenstein restoration, Young Frankenstein Internet Archive UPD, Young Frankenstein alternate cuts.
Purchasing a Blu-ray or DVD is the most reliable method.