btw this will only work for people who have ios/apple it won't work for anything else sorry
okay you'll need 3 apps
• A drawing app
•Documents 5
•video star

these are what the icons look like
now to download audio
go onto documents 5

and press the search button on the bottom right corner

where it says "go to this address" type in the name of the audio

like this
and press onto the title of the video of your choice

until this pops up
then you press copy link

they you change the address into the link

then you add in "ss" into the address between . and youtube.com

then you press go

this will happen after
now press download

now press done

now your audio will be in downloads
you'll have to drag out the video and put it into photos so it'll be in your photo gallery

now to learn how to edit
it's really simple

first make sure you have all your frames

now go ono video star and press the plus button on the top right corner

now press select song

you now press videos in the bottom right corner and you'll find your audio

now you press the plus button on the bottom right corner

and just do what it has in the picture

you press "camera roll" and you'll have all your frames in there

also

i suggest having your record speed in slow motion so it'll be easier to edit with