ruby on rails 4 - Params missing link_to -

here's html link:

<%= link_to "select thumb", update_thumb_src_video_path(video), method: :patch, video: {thumb_src: name} %> 

when error pops, params listed id, authenticity_token , method, not video params.

this worked:

 <%= link_to "select thumb", update_thumb_src_video_path(video, video: {thumb_src: name}), method: :patch %>