Could you guys do another post regarding finding music for videos? That's always the worst part of making a video – finding music for it, and the frustrating amount of time it takes to find good music. It can take as long to find music as it does to edit the whole video; sometimes longer. And that's especially true if you let your video run longer than four minutes.
YouTube has some automatic algorithm that is able to identify copyrighted audio. I first encountered it many years ago when I did a YouTube video of my grandson's first steps and used Fats Domino's 60s rock tune, "I'm Walking" as the audio track. BAM, the video was disabled right away. I got the message! Nowadays, YouTube is a little more sophisticated; they just disable the audio track and flag it as a copyright violation.
This page lays out advice for finding legal music and lists a bunch of sources for creative commons music. Another approach is to Google "creative commons music" and you'll find tons of creative commons and public domain music.
Also, here are some sites recommended by readers in the past for licensing music legally.
Everyone, feel free to share your favorite public domain, creative commons music source.