There are quite a few clipping videos on YouTube
https://www.youtube.com/watch?v=NYG8_G7e_cI
https://www.youtube.com/watch?v=RhzLWKRdON0
https://www.youtube.com/watch?v=pvZdON1NDJM
https://www.youtube.com/watch?v=LFLCD12RKbw
https://www.youtube.com/watch?v=fRWw4f4OFX4

Also root brushing
https://www.youtube.com/watch?v=zyN6SoeV5hA