HeartSocket is a simple application that streams the data of your HeartRate monitor via websocket or export it to a CSV file.

With the WebSocket connection, you can easily create custom video streaming overlays for OBS Studio using or any other streaming software (check guide section in the app).

This app should work with most Ble Bluetooth Heart Rate monitor
Such as:
Polar H6 / Polar H7 / Polar H9 / Polar H10
Magene H64 Dual Protocol Heart Rate Sensor