I’ve not been able to contact the priest, but I have found this:
1990 CODE OF CANONS OF ORIENTAL CHURCHES
Canon 1 - The canons of this Code affect all and solely the Eastern Catholic Churches, unless, with regard to relations with the Latin Church, it is expressly stated otherwise.
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Canon 720 - §1. Individual and integral confession and absolution constitute the ordinary way by which the Christian faithful who is aware of a serious sin is reconciled with God and the Church; only physical or moral impossibility excuses one from confession of this type, in which case reconciliation can take place in other ways.
§2. Absolution of many penitents at the same time without prior individual confession cannot be imparted unless:
1° the danger of death is imminent and there is not time for the priest or priests to administer the sacrament of penance to the individual penitents;
2° there is a grave necessity, that is, when in light of the number of penitents, a supply of priests is not available to administer the sacrament of penance to the individual penitents within a suitable time so that, through no fault of their own, they are forced for a long time to be deprived of sacramental grace or reception of the Divine Eucharist; it is not considered a sufficient necessity if confession cannot be readily available only because of the great number of penitents as can occur on the occasion of some great feast or pilgrimage.
§3. The eparchial bishop is competent to decide when such grave necessity exists and can determine such a case of necessity with general prescriptions having taken counsel with the patriarch and eparchial bishops of the other Churches sui iuris exercising power in the same territory.
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