Who are the eight [types of] individuals that the chant refers to, and what is the meaning of the chant?
Apparently, it is the Wat Phra Ratana Mahathat Monks at evening service before the great bronze Chinnaret Buddha, Phitsanulok Thailand.
Source: Freesound
The translation came from the YouTube comments section but I cannot locate it any longer. Here is the link to a looped version...
Of good conduct is the Order of the Disciples of the Blessed One.
Of upright conduct is the Order of the Disciples of the Blessed One.
Of wise conduct is the Order of the Disciples of the Blessed One.
Of proper conduct is the Order of the Disciples of the Blessed One.This Order of the Disciples of the Blessed One, namely these Four Pairs of persons, the eight [types of] individuals,
is worthy of gifts,
worthy of hospitality,
worthy of offerings,
worthy of reverential salutation,
and is an incomparable field of merit for the World.
Supatipanno Bhagavato sāvakasangho
Ujupatipanno Bhagavato sāvakasangho
Ñāyapatipanno Bhagavato sāvakasangho
Sāmīcipatipanno Bhagavato sāvakasanghoYadidam cattāri purisa yugāni
Attha purisa puggalā
Esa Bhagavato sāvakasangho
Āhuneyyo
Pāhuneyyo
Dakkhineyyo
Añjalīkaranīyo
Anuttaram Puññak khettam lokassāti