Rails .scan won't work with a model variable using nokogiri

Question

Hello,

I 'll try to be as explicit as possible I am using nokogiri to parse links from paths and rules out of a database

I have this model:

--- !ruby/object:Content 
attributes: 
  id: "2"
  name: http://www.****** try
  description: try
  url_base: http://www.******
  scan_flv: /"file","([^<>]*flv)"\);/imu
  source_site_id: "2"
  content_id: "2"
attributes_cache: {}

In my application:

sub_flv = Nokogiri::HTML(open(suburlflv))
sub_flv.search(url.path_flv).each do |flv|
   @flv << flv.content.scan(/"file","([^<>]*flv)"\);/imu)
end

Workds fine and successfully returns something - http://www.********.flv

Now I have url.scan_flv from the Content model with /"file","([^<>]*flv)"\);/imu inside

When I do

sub_flv = Nokogiri::HTML(open(suburlflv))
sub_flv.search(url.path_flv).each do |flv|
      @flv << flv.content.scan(url.scan_flv)
end

I just got nothing parsed...

Can somebody enlight me on this problem? I think it is related to encoding out of url.scan_flv. There is a method I should use?

Thanks in advance