Parse response to JSON instead of using regex

src/invidious/channels.cr

@@ -358,16 +358,20 @@ end
 def fetch_channel_playlists(ucid, author, continuation, sort_by)
   if continuation
     response_json = request_youtube_api_browse(continuation)
-    result = JSON.parse(response_json.match(/"continuationItems": (?<items>\[.*\]),/m).try &.["items"] || "{}")
+    # result = JSON.parse(response_json.match(/"continuationItems": (?<items>\[.*\]),/m).try &.["items"] || "{}")
+    result = JSON.parse(response_json)
+    continuationItems = result["onResponseReceivedActions"]?
+      .try &.[0]["appendContinuationItemsAction"]["continuationItems"]
 
-    return [] of SearchItem, nil if result.size == 0
+    return [] of SearchItem, nil if !continuationItems
 
     items = [] of SearchItem
-    result.as_a.select(&.as_h.has_key?("gridPlaylistRenderer")).each { |item|
+    continuationItems.as_a.select(&.as_h.has_key?("gridPlaylistRenderer")).each { |item|
       extract_item(item, author, ucid).try { |t| items << t }
     }
 
-    continuation = result.as_a.last["continuationItemRenderer"]?.try &.["continuationEndpoint"]["continuationCommand"]["token"].as_s
+    continuation = continuationItems.as_a.last["continuationItemRenderer"]?
+      .try &.["continuationEndpoint"]["continuationCommand"]["token"].as_s
   else
     url = "/channel/#{ucid}/playlists?flow=list&view=1"