Add the minimum ruby version requirement in your README.md

[sebma]

Hi,

Can you add the minimum ruby version requirement in your README.md ?

Btw : I think the bundle command is bundle install not Bundle install

[elvisef]

I think if you can change it directly in your Gemfile, it's not really necessary, but... would be a good information.

Generally, from what I see, the last project update was about 2/3 years ago, for any file here.
Wondering, why nobody answer any questions here : ) Even the author himself..

I am using now ruby version 2.3.3 on my Debian 9 stretch (stable).

[elvisef]

One more info here (youtube-dl project page): http://rg3.github.io/youtube-dl/download.html

"Remember youtube-dl requires Python version 2.6, 2.7, or 3.2+ to work except for Windows exe."