It sounds like you're referring to a video or process showcasing the quick preparation of "papor" (often known as "papad" or "papadum") on the streets of Bangladesh. Papor is a popular snack in South Asian cuisine, made from dough of lentils, chickpeas, rice, or potato, which is rolled out thin and either sun-dried or roasted.
In a typical street food setting in Bangladesh, vendors often prepare and cook papor rapidly, using hot oil to fry it or an open flame to roast it. The process involves:
1. **Preparation of Dough:** The dough is made from flour (usually lentil flour), spices, and water, mixed into a smooth consistency.
2. **Rolling:** The dough is rolled into thin, round discs.
3. **Cooking:** The papor is quickly cooked by deep frying in hot oil or roasting over an open flame until it puffs up and becomes crispy.
This process can be quite fast, often taking just seconds to transform the rolled dough into a crispy snack ready to eat. This quick preparation method is a staple of many street food vendors, allowing them to serve fresh, hot papor to customers on demand.