If you are in a company network with a good firewall, the video stream will not always get through.
This is due to the security of the network where the smart-phone is located and not to the camera or the server.
Try switching to mobile internet and see if you can connect.
If this still doesn't work, the problem may be in the settings of the modem at home.
You can turn on the UPNP function in the modem or possibly forward the camera over port 80 using a UDP protocol.
If you have any additional questions, you can always contact us via this website.
Please state the complaint clearly so we can help you.