Just *one* copyright — yours!
Just list the credits like:
Stock footage by *****
If more than one provider - least each under the Stock Footage label (just a list of providers will generally do).
Music "name of track" by ********
If more than one track - list each (name of track by *******) under the Music label.
Sound Effects by ******* [for many Apple sounds, the "by" can be found in the Info inspector > Audio — check for Authors like for Motions & Transitions Wipe 01, the Author is "Detroit Chop Shop", otherwise use Apple, Inc.]
(You can find the actual copyright notice in the inspector for *most* Apple sound effects/jam packs.)
If more than one SoundFX provider, split the credits for each creator, like the stock footage section.
——— it is understood (and automatic) that each of these creators credited has a copyright to their own works, you don't need to post it for them! ———
Then your ©
Basically, just like you'd see on any commercial work, with any similar format you like [Line at a time lower thirds, Scrolling credits on the backend, etc...]. You can be creative with this, just have the credits burned into the video some kind of way.