Add Youtube Video Series

•Adds youtube video series into tutorials

not sure why these jobs failed, the url works.

Thanks for another PR @rvmelkonian! However, we recently started requiring more descriptive commit messages because the log started to fill with generic Update README.md commits (as can be seen here), which is the default commit message when using GitHub Web UI. Once the commit message is a bit more descriptive (you can use the PR title, that's perfect) and linting issue (Youtube -> YouTube) is fixed, I will merge this :+1:

Linting is important: in addition to readability, we are trying to get included to the official Awesome list (https://github.com/sindresorhus/awesome/pull/2302).

Maybe better category could be Videos? :thinking: