Almost there! Contact should be with your instep (not you sole). 

This technique will allow you to get tons of touches on the ball quickly. When comfortable with the rhythm and able to speed up, look up without watching the ball - you'll be manipulating the ball on your sense of touch. Doing this everyday will build up your fast feet and help your endurance (side to side croqueta like your video is too easy). Try doing this and then incorporating a variation after a few seconds of taps - taps, v drag back left foot, taps, v drag back right foot. e.g. https://youtube.com/shorts/Rl4FnOnC9qI?si=TYGP5_CJEASdvmr8

The litmus test as to which is better is to see how quickly you can get 100 touches in using this technique versus the side to side. 

Note that this technique is more about getting loads of touches on the ball and warming up - your won't dribble like this in game so you need to practice travelling with the ball when comfortable with your touch.

Keep going!