Issue #3200253 by sokru, john franklin, herved, arturs.v, cgknutt, robloach: Add "title" attribute to YouTube, Vimeo, and Playlist embeds
Uses commits from MR !42 (which targets 8.x-2.x), but excludes changes to video_embed_wysiwyg module since that has been removed from 3.0.x.
Closes #3200253