I was downloading free royalty sounds from Youtube through mp3 converter for my videos and everything was fine until moderators started to delete videos from my channel. I was shocked because there was nothing to censor, just let's play materials for every age. Then a moderator told me that I should not post any videos with unlicensed sounds. So I was needed to find any platform to download "legal" music and sounds. I found https://depositphotos.com/music.html, they take $19 per month and they have a lot of stuff there. So now I don't have any problems with moderation and I really feel protected.