Here's the 22 minute Starzinger movie, in widescreen ToeiScope. This was shown as part of the Toei Manga Matsuri, a semi-annual festival of anime and tokusatsu featurettes that were shown when the kids were on vacation from school. Sometimes these featurettes would just be regular TV episodes cropped and blown up to widescreen 35mm film, but (despite what Anime News Network's encyclopedia page claims) this is not one of those, it's an original Starzinger story not shown on television.