Kadence YouTube Block: Lightweight, engaging block to show YouTube videos within posts#13

Requesting a lightweight native YouTube block with autoplay/preview thumbnail, an optional subscribe banner, and a floating lower-right mini-player once scrolled past, to tie blog content and YouTube videos together. (Migrated from featureOS: https://feedback.kadencewp.com/p/kadence-youtube-block-lightweight-engaging-block-to-show-youtube-videos-within-posts)