```ruby
require 'helix'

FILENAME = './helix.yml'

media_by_id = {
  'album_id' => Helix::Album,
  'image_id' => Helix::Image,
  'track_id' => Helix::Track,
  'video_id' => Helix::Video
}
media_by_id.each do |guid_key,klass|

  items = klass.find_all(query: 'rest-client', status: :complete)
  puts "Searching #{klass.to_s} on query => 'rest-client' returns #{items}"

  media_id = YAML.load(File.open(FILENAME))[guid_key]
  item = klass.find(media_id)
  puts "Read #{klass} from guid #{media_id}: #{item.inspect}"

  if klass == Helix::Video
    h = {
      # these keys are only available on the oobox branch
      #comments:    item.comments,
      #ratings:     item.ratings,
      screenshots: item.screenshots,
    }
    puts "#{klass.to_s} #{media_id} has #{h}"
  end

  next if klass == Helix::Album # No Update API yet

  ['before rest-client', 'updated via rest-client' ].each do |desired_title|
    item.update(title: desired_title, description: "description of #{desired_title}")
    item.reload
    puts "#{klass.to_s} #{media_id} title is '#{item.title}'"
    puts "#{klass.to_s} #{media_id} description is '#{item.description}'"
  end
end
```

Read media_id from Helix::Base::CREDENTIALS, rather than re-parsing YAML
user
```ruby
require 'helix'

FILENAME = './helix.yml'

media_by_id = {
  'album_id' => Helix::Album,
  'image_id' => Helix::Image,
  'track_id' => Helix::Track,
  'video_id' => Helix::Video
}
media_by_id.each do |guid_key,klass|

  items = klass.find_all(query: 'rest-client', status: :complete)
  puts "Searching #{klass.to_s} on query => 'rest-client' returns #{items}"

  media_id = Helix::Base::CREDENTIALS[guid_key]
  item = klass.find(media_id)
  puts "Read #{klass} from guid #{media_id}: #{item.inspect}"

  if klass == Helix::Video
    h = {
      # these keys are only available on the oobox branch
      #comments:    item.comments,
      #ratings:     item.ratings,
      screenshots: item.screenshots,
    }
    puts "#{klass.to_s} #{media_id} has #{h}"
  end

  next if klass == Helix::Album # No Update API yet

  ['before rest-client', 'updated via rest-client' ].each do |desired_title|
    item.update(title: desired_title, description: "description of #{desired_title}")
    item.reload
    puts "#{klass.to_s} #{media_id} title is '#{item.title}'"
    puts "#{klass.to_s} #{media_id} description is '#{item.description}'"
  end
end
```
assistant