Hi parents, could you share the type of YouTube channels you allow your kids (ages 0-7) to watch? How do you ensure they watch 'safe', high quality content and educational content?

My baby is 7 +months old. I have yet to introduce any tv/YouTube/dvd as research have shown that they are not beneficial to the children. When i on YouTube for nursery rhymes or music I Ensure that only the music is being heard. Totally no watching of the screen at all