Theming Node type | Pixel Clever

I have a gallery created with Views, however when I click on the thumbnail, the default node type (content type) is displayed. I thought that it would be possible to create a View for the Content (node) type, but I do not see how do this? So to theme the node type do I have to do that in the template file or create a node_type.tpl file?
I would have thought it would be possible to associate a view to a content type (node type), so every time the node type is displayed it automatically picks up the view? i.e. Create node type video, create a view for video, and every time a video is selected it uses the video view. Thanks for helping with the learning.