(help)after effects how do i make the background transparent.

[jakassme]

so im about to have a stroke out of pure anger :l

i need help with after effects i worked on this 2 second anime clip for A HOUR

what im trying to do is key chroma,i finished it but im really annoyed that i dont know how to make the background of it transparent, its just black i tried something called toggle transparency grid it worked pretty much till i rendered it,it was just that black background because it was toggled?

any help for a nooby?

the anime is naruto shippuden if anybody wants to know :L

 

[Qazplm]

What are you exporting as? I believe the only file type that supports transparent backgrounds is .flv

 

[jakassme]

What are you exporting as? I believe the only file type that supports transparent backgrounds is .flv

i was exporting it as mp4 if it is only flv then the only thing i still need is to figuring out how to set background as transparent XD i did this bs frame by frame hardest thing ive ever done