Проверка подписки на несколько каналов для Telegram бота

简介：

In this tutorial, the presenter walks through how to check subscription status for multiple Telegram channels using a bot. 00:00 – Introduction; 00:35 – List of Telegram channels; 01:40 – How to get channel IDs; 02:30 – Message for unsubscribed users; 03:10 – Function to check subscription; 05:40 – Checking subscription; 07:00 – Generating keyboard with channels; 11:10 – Handler for "I SUBSCRIBED" button; 12:45 – Testing.