ASIAIR Video feature should provide an option to stack the frames in the video just captured on the device and save that resulting stacked image to the mobile device. This is similar to the Live Stacking feature but for Videos.
This can also be implemented with a new "Video Live Stacking" feature (this feature is for stacking a video (mp4 or avi) into one single image), to go alongside the existing functionality of "Live Stacking" (this one is for individual exposures stacked into one picture).