Autofocus in Video for example in 700D is slow *not sure why* (Maybe the cameras doesn't know when to refocus on subjects, motion detection problems?), when pressing half-shutter while shooting videos the Autofocus becomes faster and it focuses a lot quicker (It thinks we will take picture during video recording).
If there any way and maybe it exists; to make:
1-Motion detect (making the camera recognize big movements to refocus and when to refocus).
I haven't managed to test Motion Detect feature in ML for taking pictures when Action happens.
2-After big movements detection pressing half-shutter digitally by ML to focus faster.
Not sure if this way can help, maybe Yes.