Particle system is a separate Alpha Channeled motion graphic element. Feel free to use it separately or edit it. Replace the text with anything (logo, footage, image) Circles are shape layers so edit them as much as you like.
Particle system footage is in 3840x2160 HD resolution. However you can resize it because the original footages' particles don't leave the active screen. (So when you resize and place it somewhere particles wouldn't disappear suddenly.)
AEP
3840 x 2160