danbooru/app/views/posts/partials/show/_video.html.erb

<%= content_tag(:video, nil, :id => "image", :width => post.image_width, :height => post.image_height, :autoplay => true, :loop => !post.has_tag?("video_with_sound"), :controls => "controls", :src => post.file_url) %>

<p><%= link_to "Save this video (right click and save)", post.file_url %></p>