The incident happened on June 24, about 1am, on Korari Crescent in Mangakino.
No one was at home but the fire caused extensive damage.
Mangakino Fire and Emergency volunteers stopped the fire from engulfing the property.
Police are seeking any information that identifies the pair in the video.
One person appears to have sustained burns. There were “concerns” they may be injured and avoiding the treatment they required, a police spokesperson said.
Mangakino residents who have CCTV were being asked to check their footage around the time of the fire and report any movement of people or vehicles.
Information can be provided to police by calling 105 or clicking ‘update report’ at police.govt.nz/use-105
Please reference file number 240624/1835.
Information can also be provided anonymously via Crime Stoppers on 0800 555 111.