[rai] Detect ContentItem in iframe (closes #12652) (#27673)
[rai] Detect ContentItem in iframe (closes #12652) (#27673)

Co-authored-by: Sergey M. <bdb205cc17b53d44ea715babf9b070f7f79051af@gmail.com>
Tatsh/youtube-dl,rg3/youtube-dl,rg3/youtube-dl,Tatsh/youtube-dl,ozburo/youtube-dl,ozburo/youtube-dl