I was just being a jealous guy, seeing how normal YouTube embeds (oEmbeds) got previewed nicely in WordPress 4.0 TinyMCE editor. This had been on my wishlist for a long time already and I looked into enabling that for httpv-links and lyte-shortcodes as well, but that turned out not to be that simple.
So I took the alternative approach, enabling WP YouTube Lyte to act on normal YouTube-links (a much requested feature anyhow) and thereby piggy-backing on the TinyMCE-improvement in 4.0. So there you have it; lyte video’s can be inserted using normal YouTube links and that will result in a (non-lyte) preview of the video in the visual editor content box.
1.5 as a number of other improvements and bugfixes, but you can read all about those in the changelog.
Have fun with this small Rick James like party-track to celebrate 1.5.0 (and my birthday, while we’re at it);