These are the restaurants from the video in sequence with its address in Google Maps:
1) Fok-Kee Porridge 富记粥品 104 Fa Yuen St, Mong Kok, Hong Kong
2) Seng-Kee Porridge 成记粥品 Macau, 新馬路新馬路營地大街吳家圍
3) Hopewell centre 合和中心 Hong Kong, Wan Chai, Queen's Rd E, 183號
4) Yao-Kee noodle, Portland St, Yau Ma Tei, Hong Kong
5) Sing Heung Yuen 胜香园 2 Mee Lun Street, Central, Hong Kong
6) Café Namping 南屏雅叙 Macau, 新馬路十月初五街85-85A號地下
All the food here are under $50HKD per meal ($6.5 USD in 2019) and it's great to explore the local cuisine and observe their daily life.
shot and edited in iPhone.