video feature: modify refresh auth api

app/controllers/users/video_auths_controller.rb

@@ -10,7 +10,9 @@ class Users::VideoAuthsController < Users::BaseController
 
   def update
     video = observed_user.videos.find_by(uuid: params[:video_id])
-    return render_error('该视频凭证不存在') if video.blank?
+    if video.blank?
+      video = observed_user.videos.create!(uuid: params[:video_id], title: params[:title], cover_url: params[:cover_url])
+    end
 
     result = AliyunVod::Service.refresh_upload_video(video.uuid)
     render_ok(data: result)