Add 'type' field to ChannelVideo and Video

src/invidious/channels.cr

@@ -11,6 +11,8 @@ end
 struct ChannelVideo
   def to_json(locale, config, kemal_config, json : JSON::Builder)
     json.object do
+      json.field "type", "shortVideo"
+
       json.field "title", self.title
       json.field "videoId", self.id
       json.field "videoThumbnails" do

src/invidious/videos.cr

@@ -276,6 +276,8 @@ struct Video
   def to_json(locale, config, kemal_config, decrypt_function)
     JSON.build do |json|
       json.object do
+        json.field "type", "video"
+
         json.field "title", self.title
         json.field "videoId", self.id
         json.field "videoThumbnails" do