u/Affectionate-End-458

Hii! I have a question regarding licensing stuff. I’m not from an english speaking country so i’m sorry for any mistakes!

a bunch of friends of mine have a very small indie band, and I was thinking about making background/visualizer videos for their songs to upload to YouTube and other platforms.
I wouldn’t charge them for the work, and I wouldn’t take any money from the videos or from whatever revenue they might make. The visuals would just be simple animated backgrounds/audio-reactive visuals made by me.
are there any copyright or licensing issues I should be aware of in this situation? thanks!