About HD streaming on Gaming

720p stream the hher resolution you want to stream in, the more it will demand in bitrate (how much data you upload per second) and your encoding. for example, if you use CPU encoding. I am not sure if it is true, but according to this post, the reason NASA only streams at 720p is because that is all Microsoft Teams supports.

720pstream, The 5.7 Mbps upload speed for 720p video at 30 frames per second is the upper limit. You can still live stream 720p video with a lower upload.