It might seem strange, but using your LTE/4Q mobile data produces a more stable connection stream during video calls. However, your mobile data plan might be more expensive than your Wifi internet connection.
In order to process the amount of video footage (realtime video call + upload of HD video footage to the servers), you would transfer up to 1 Megabyte per second.
As a rule of thumb, you would require 1 Gigabyte of free space on your mobile device for a HD recording of approximately 30 minutes. NowMax temporarily stores the recorded footage before uploading it to the cloud.
Of course, the transmission of the HD video footage demands the biggest amount of data.
In order of size: HD video footage > realtime video footage > HD audio footage > realtime audio footage