1st video vs 2nd video
pad holding is 1) a form of coaching and 2) a seperate are in of itself. Thus your coach should be holding pads not other students, as its the coaches job to coach. This isnt to say that a student cannot be a good pad holder, myself and many other fighters from the gym know how to hold pads, but we should be hitting them not punching them. anyways, generally speaking most gyms have students holding pads for eachother, most the time the pad holder/student doesnt know wtf they are doing, and when the pad holder doesnt know what they are doing, it is the blind leading the blind........watering down of muay thai in america.
long story short as everyone has already mentioned, it should be interactive, meaning working both offense, defense, counters, etc. almost like sparring with your pad holder.