Revert: "Change Youtube social section of the website (!336)"
Purpose
This MR is my mistake because it use https://taggbox.com service as mention in #80 (closed) issue. So I want to revert the youtube section like it was before my MR(!336 (merged))
Preview
The review link: https://hoangdatngo.gitlab.io/gci19-fossasia-org/
Edited by Ngo Hoang Dat