The first shown method in the video needs good timing and precision, and is thus meant for TAS (one turns around as ball right after shooting the projectile). The second method is easily doable: First one can get in contact with shaktool for temporary invulnerability to safely get to the right side without any annoying knockback as ball to shoot at the snail during the crouch and facing left when it gets hit so it stays within the screen which it needs to be able to move. Then one gets temporary invulnerability again to be able to quickly move past the snail (without getting stopped by it). The general idea of the trick is to manipulate the snail to break blocks instead of Shaktool.