I've had a lot of requests to make short intro music. Here's one thats about 10 sec and totally free to use, even in commercial projects ! Hope it helps :) : r/VideoEditing
Intro Music - Download Unlimited Royalty Free Music
Free Intro Maker: Create YouTube Video Intros | Canva
Free Intro/Outro Music MP3 Download - Pixabay
Short Positive Intro / Outro Music - Corporate Video Bumpers - YouTube