(without "part1")
The full title as listed on the official HEYZO site is often: heyzo heyzo-2019 part1
The proper feature (canonical title) for that video would be: (without "part1") The full title as listed on
If "part1" appears, it likely refers to a split or edited version from a third-party site. The official release is a single video. heyzo heyzo-2019 part1