How to get a Youtube channel RSS feed after 2015 April 20 (without v3 API)?
After April 20, 2015, YouTube discontinued support for the RSS feed feature in the version 2 of their API. However, there are still a few ways to generate an RSS feed for a YouTube channel using other methods. One way is to use the YouTube Data API v3, which requires an API key and some coding knowledge to implement. Another option is to use a third-party service or website that can generate an RSS feed for a YouTube channel, such as youtube-rss.com or feedyouyoutube.com.
With php you can use the Google API client library for PHP to access the YouTube Data API v3 and retrieve the channel's videos.
You can also use the YouTube API V3 to get the channel's videos and then generate an RSS feed from that data using PHP.