@knowledgeseeker 

Hi, 
1. Please ensure your phone and the camera are connected to the same Wi-Fi, turn off the mobile data on your phone, and then check if you can download the video clips from the SD card on the Tapo app.

2. You can try the following steps if the two issues you mentioned remain.
  1) Temporarily disable any VPN apps or other security software with VPN mechanisms that may be affecting the network connection to see if it helps.
  2) Clean the app caches on your phone for a try. 
  3) If you have another phone or tablet, try installing the Tapo app to troubleshoot whether the issue is specific to a particular device.

Best Regards