WP YouTube Lyte and mobile, I must be honest, it is not an easy marriage. Light YouTube Embeds focuses on optimizing performance by displaying a dummy player which takes less then a tenth of what a normal YouTube embed requires. Only when clicking on that dummy player, the real YouTube embed is loaded and auto-played. Simple and efficient, no?
Mobile is an whole other ballgame. For starters, there’s no autoplay on YouTube mobile embeds. At all, because Apple prohibits autoplay in HTML5 video and browsers on Android seem to agree. So the trick with the dummy player does not work (unless you would accept users having to click twice) and as a consequence, WP YouTube Lyte on mobile loads the (mobile) embed straight away.
But that’s not all; for audio-only to work, auto-hide has to be disabled (as the bottom controls are the only player elements that remain visible) but that despite setting autohide=0&controls=1, controls still remain hidden in mobile YouTube embeds, rendering the audio-only player UI useless, as a consequence of which WP YouTube Lyte has to show the full video on mobile. And YouTube playlists on mobile are known to be broken as well, one can only hope this is being worked on by YouTube.
And then one week ago a user posted about yet another mobile-specific problem on the wordpress.org WP YouTube Lyte supportforum; when rotating your smartphone or tablet, the size of the embedded video did not adjust. The reason in a nutshell; while LYTE (the dummy player) is responsive, the YouTube iframe-embed that is loaded on mobile is not. To solve this, I added an orientationchange event handler (WebKit-only to my disappointment, although I do have an alternative approach that I might introduce at a later stage) in version 1.3.3 which I released earlier today, re-requesting the embed when the orientation changes.
The conclusion; WP YouTube Lyte works on mobile, but it is not the most elegant of solutions at this particular stage. So in the spirit of full disclosure; if desktop & performance are key, then WP YouTube Lyte remains one of the best solutions for YouTube on WordPress out there, but if your main target audience is mobile web, you should at least be aware of these limitations (some of which also exist outside of WP YouTube Lyte).