I would like to get the same information (opened orders) as displayed in order book on Binance site here:
I tried:
/api/v3/allOrders
-- this apparently shows all MY orders
api/v3/openOrders
-- this apparently shows opened MY orders
and
/api/v3/trades
-- this apparently shows closed orders
How to see OPENED EVERYBODY'S orders?
You're looking for the Order Book endpoint.
Docs: https://binance-docs.github.io/apidocs/spot/en/#order-book
Example: https://api.binance.com/api/v3/depth?limit=10&symbol=BTCUSDT