Ruby on Rails

Walter Davis wrote in post #1184561:

> This is a very well solved problem, so there hasn't been a lot of change
> in this area. What have you tried, and where has it gone wrong for you?
>
> Walter

Thanks for your response Walter.
I tried to follow the steps of:

https://www.pubnub.com/blog/2015-12-08-building-video-sharing-app-server-messaging-ruby/

with rails 4.2.6, ruby 2.2.1 and it doesn`t work for me. I used the gem
'paperclip' to upload images before, but not to upload videos, and I
never used the majority of gems of that proyect. I'm learning RoR since
three month ago and i don't know many of concept yet, nor the reason of
the generated errors.
What knowledge I should have to do a project like this?
Do you know some material (web pages, video tutorials, books...) to
learn this concepts?
Regards

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