Hello @Ed3lm4n 

• To remotely stream camera, ensure to open below ports for Tapo camera in router Port Forwarding settings: 

ONVIF Service Port: 2020
RTSP Service Port: 554

• Test if ports 2020 & 554 are opened through port scan website like www.canyouseeme.org

Besides, it will show WAN IP/ Public IP and should be the same as the WAN IP address on router web page.  If the IP address is  different, the router IP address may update or you have another firewall / router in front of  house router. 

• Test RTSP connection via VLC Player locally &  remotely. 

URL: rtsp://your camera IP Address:554/stream1

If the same, may I know your network topology e.g ISPXX + Modem+ router model XX<wireless>Tapo Camera;  is the IP address showing in the canyousee.org the same as the public IP you used in APP; can you access camera remotely on VLC Player? Thank you