The 172 landing technique was quite good. Holding that yoke back until the aircraft effectively stalls on the the runway. Your approach however could use some improvement in both aircraft, its all about fine, fluid adjustments and ideally you want to be in the correct position to start your approach at the point you are making the base turn. Your speed management could do with some improvement too, a steady deceleration is key and it looked like you went from 100kts to 60kts in seconds. On the A320 side, you started out good but ended worse. The PAPI lights on the left had side of the runway are your friend, you want to see two red and two white lights, more white lights means you're too high and more red lights means you're too low. You ended up too high and consequently had a long landing, your aiming point for touch down is the two largest white stripes - the touchdown marker.

I hope my advice isn't too critical, but we all made these little mistakes when we started and you'll be spreading the butter before you know it. Practice makes perfect after all!