By “still shots” do you mean to capture the Tracker screen as is while playing a track?
Also, if this wish is technically possible at all, I guess it will capture whatever appears on the screen during the screen recording (i.e. if you go to the mixer / perform mode / pattern mode… the screen capture will follow that). Anyway, I guess that whatever is being captured will depend a lot on the performance limitations.
And a technical detail: according to Writing a good feature request we should avoid to write wishes in first person.