Place it near the end of a short chat-style edit, after Olha a Mensagem sets up a reply and before Abriu o Áudio confirms the message was heard. That order gives the Monday announcement a clear prompt and a playful close.
Об этом звуке
This three-second Portuguese voice clip says, in a casual spoken line, that Monday is the day for heading to Foz. The delivery is light and matter-of-fact, like a quick message sent to friends before a trip. It gives a small lift of anticipation, turning an ordinary weekday plan into a cheerful announcement worth repeating.