Examples in the video are listed here: arrow, wind charge, wither skull(blue), dragon fireball, fireball
Arrow: shot at entity’s head
Wind Charge: shot at entity’s head
Wither Skull: shot at entity’s head
Dragon Fireball: shot above entity’s head
Fireball: shot at entity’s body
Through the video, only wither skull and fireball explode in a short distance. And if you hit them away, they won’t explode in this short distance. So, I suppose the entity(player) itself triggered explosion of projectiles. And this due to the position they were shot. If we can set the position with a item component, it will be more compatible.
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