Add 'paid' and 'premium' flags to API

src/invidious.cr

@@ -2245,6 +2245,8 @@ get "/api/v1/videos/:id" do |env|
       json.field "likeCount", video.likes
       json.field "dislikeCount", video.dislikes
 
+      json.field "paid", video.paid
+      json.field "premium", video.premium
       json.field "isFamilyFriendly", video.is_family_friendly
       json.field "allowedRegions", video.allowed_regions
       json.field "genre", video.genre
@@ -2602,6 +2604,8 @@ get "/api/v1/channels/:ucid" do |env|
               json.field "published", video.published.epoch
               json.field "publishedText", "#{recode_date(video.published)} ago"
               json.field "lengthSeconds", video.length_seconds
+              json.field "paid", video.paid
+              json.field "premium", video.premium
             end
           end
         end
@@ -2657,6 +2661,8 @@ end
             json.field "published", video.published.epoch
             json.field "publishedText", "#{recode_date(video.published)} ago"
             json.field "lengthSeconds", video.length_seconds
+            json.field "paid", video.paid
+            json.field "premium", video.premium
           end
         end
       end
@@ -2704,6 +2710,8 @@ get "/api/v1/channels/search/:ucid" do |env|
             json.field "publishedText", "#{recode_date(item.published)} ago"
             json.field "lengthSeconds", item.length_seconds
             json.field "liveNow", item.live_now
+            json.field "paid", item.paid
+            json.field "premium", item.premium
           when SearchPlaylist
             json.field "type", "playlist"
             json.field "title", item.title
@@ -2825,6 +2833,8 @@ get "/api/v1/search" do |env|
             json.field "publishedText", "#{recode_date(item.published)} ago"
             json.field "lengthSeconds", item.length_seconds
             json.field "liveNow", item.live_now
+            json.field "paid", item.paid
+            json.field "premium", item.premium
           when SearchPlaylist
             json.field "type", "playlist"
             json.field "title", item.title

src/invidious/helpers/helpers.cr

@@ -358,6 +358,18 @@ def extract_items(nodeset, ucid = nil)
         live_now = false
       end
 
+      if node.xpath_node(%q(.//span[text()="Premium"]))
+        premium = true
+      else
+        premium = false
+      end
+
+      if node.xpath_node(%q(.//span[contains(text(), "Get YouTube Premium")]))
+        paid = true
+      else
+        paid = false
+      end
+
       items << SearchVideo.new(
         title,
         id,
@@ -368,7 +380,9 @@ def extract_items(nodeset, ucid = nil)
         description,
         description_html,
         length_seconds,
-        live_now
+        live_now,
+        paid,
+        premium
       )
     end
   end

src/invidious/search.cr

@@ -10,6 +10,8 @@ class SearchVideo
     description_html: String,
     length_seconds:   Int32,
     live_now:         Bool,
+    paid:             Bool,
+    premium:          Bool,
   })
 end
 

src/invidious/videos.cr

@@ -407,6 +407,23 @@ class Video
     return @player_json.not_nil!
   end
 
+  def paid
+    reason = self.player_response["playabilityStatus"]?.try &.["reason"]?
+
+    if reason == "This video requires payment to watch."
+      paid = true
+    else
+      paid = false
+    end
+
+    return paid
+  end
+
+  def premium
+    premium = self.player_response.to_s.includes? "Get YouTube without the ads."
+    return premium
+  end
+
   def captions
     captions = [] of Caption
     if player_response["captions"]?