Fix video ID redirect

src/invidious.cr

@@ -2615,6 +2615,7 @@ end
 get "/:id" do |env|
   id = env.params.url["id"]
 
+  if md = id.match(/[a-zA-Z0-9_-]{11}/)
     params = [] of String
     env.params.query.each do |k, v|
       params << "#{k}=#{v}"
@@ -2627,6 +2628,9 @@ get "/:id" do |env|
     end
 
     env.redirect url
+  else
+    env.response.status_code = 404
+  end
 end
 
 error 404 do |env|