FREE screen burn effect overlay

I nick stuff off youtube all the time so here's something back!
Clip 1 - green/bluescreen
Clip 2 - sparks - use add/ screen blend mode.
For after effects:
Clip 3 - the burn layer (Place between layer transitioning from and layer you're transitioning to)
Clip 4 - The trackmatte for the burn layer
Clip 5 - The top layer burn. Place this above your top layer (footage to transition from), set to multiply and precomp it.
Clip 6 - The trackmatte for your top layer (transition from footage)