Heyzo Heyzo-2019 Part1 Instant

If "part1" appears, it likely refers to a split or edited version from a third-party site. The official release is a single video.

The proper feature (canonical title) for that video would be: heyzo heyzo-2019 part1

The full title as listed on the official HEYZO site is often: If "part1" appears, it likely refers to a

(without "part1")