The arrangement by Ensemble Vocal L’Alliance is a specific polyphonic version. You will need the sheet music to identify your specific voice part and the timing of the "Ensemble" entries.
If you are organizing a virtual choir or practicing this specific arrangement, here is how you can approach it: ensemble_vocal_lalliance_je_vous_salue_marie_di...
Check sites like CPDL (Choral Public Domain Library) for scores, though specific contemporary arrangements may require a purchase from the composer or publisher. The arrangement by Ensemble Vocal L’Alliance is a
Since the piece is in French, focus on clear vowel placement. Pay particular attention to the "u" in salue and the nasal vowels in Priez pour nous . ensemble_vocal_lalliance_je_vous_salue_marie_di...