The inet addr is your local IP address. In this case, 192.168.0.107.
Start the Flask server by running this command:
python app.py
You will see this, which means that the server is running on port 5000 and is ready.
* Running on http://0.0.0.0:5000/
* Restarting with reloader
Open up a web browser on your favorite device and go to this address http://192.168.0.107:5000, except replace that IP address with the one that your Raspberry Pi is running on.
You should see a live view the video that your Raspberry Pi is capturing.