Most films shot on 35mm aren't naturally "widescreen." Director Steven Spielberg chose to shoot Jurassic Park using the to emphasize the vertical scale and sheer bulk of the dinosaurs.
Metadata & provenance
: While many modern fans look for 4K scans, the v1.0 release is typically distributed as a 1080p MKV file, often sized around Theatrical Colors Most films shot on 35mm aren't naturally "widescreen