1) Visit the Unicef France official twitter account (verified): https://www.youtube.com/user/unicefenfrancais
2) Visit the site linked there.
3) Go to the bottom of page and click the youtube icon.
4) You will get this youtube page: https://www.youtube.com/user/unicefenfrancais
5) The Youtube page given on these news sites is a fake one, even though it has more subscribers: https://www.youtube.com/channel/UCgC7E2YoTgUytC5IdFScqfQ
6) Also the site where you can mine cryptos for UNICEF is not a sub-part of UNICEF website, but entirely different site. https://www.chaingers.io/en/index.html
7) Clicking the Unicef logo on this site does not take you to UNICEF's site.
So I guess it would be unwise to support such scam projects. It is not from UNICEF. Scam attempts like this is what gives crypto-currencies a bad name.
If so they are absolutely immoral bastards!
How can it possible say 'it for pitiable sirian children' and earn money on those who wants help?