Regarding panning speed, how can we know what it is looking for? If it is moving quickly there may be a reason for that. Maybe it is looking at things in infrared or another spectrum which would not require slow panning.

Re your linked video - Uh, this video/still image is so blurry, you can't make out anything. Plus it appears to be taken from above the balloon, not stationed right under it. It's also narrated in a foreign language, so I don't know anything about where the video came from. You cannot compare the two images.