It took me way too long (Autoptimize and related stuff is great fun, but it is eating a lot of time), but I just pushed out an update to my first ever plugin; WP YouTube Lyte. From the changelog:
A couple of days ago a WP YouTube Lyte user asked me if Featured Video Plus and WP YouTube Lyte were compatible. It took me a day to find the answer (I first said “no”), but Featured Video Plus actually has a filter (get_the_post_video_filter) that allows one to override the code used to display the featured video. And after a bit of trial and error this is what I came up with;
Some extra checks ($post_id should not be empty, $meta should not be empty) would make this more reliable, but that’s something you should be able to add, no?
If the -experimental- HTML5 option is enabled, WP YouTube Lyte will embed HTML5 YouTube video if:
Your visitor uses a browsers that supports the h264 (Safari, Chrome, IE9) or WebM (currently development versions of Chrome, Opera and Firefox) video codecs
If these requirements aren’t met, your visitors will see a Flash-based version of the YouTube video you specified.
As newTube.js is sort of a dirty hack which replaces the LYTE dummy player with an iframe with overflow:hidden, in which the full YouTube-page is carefully positioned to display only the player, there are some other caveats to take into account as well:
But apart from all this small print, is works rather nice if I may say so myself. Or better still, just look at this little They Might Be Giants gem embedded here;
I’m a sucker for simple things and in my book, WordPress (the open source software) is a great example of a simple yet powerful solution for publishing on the web. The last few days I experienced their plugin-ecosystem to be just as simple and powerful.
Before you know it, you’ve got a bunch of real users (wp-youtube-lyte was downloaded 128 times in 2 days) who can rate your plugin and provide you with feedback. And every time you upload a new stable version via svn, a new zip-file is created and your users will get a notification in their wp-admin pages, allowing them to upgrade by simply clicking that upgrade link. Don’t you love it when a plan comes together?
But enough raving already, got to go create that admin-page for my plugin now, as requested by a user. I’m a sucker for real users!
wp-youtube-lyte plays nice with the great “Smart Youtube” plugin, in which case it will take care of the default embeds (httpv), while Smart Youtube will parse the other types (httpvh, httpvhd, httpvp, …).
It’s all nice and well to hammer out some code to create a lite YouTube embedded player, but as long as that embed-code can’t simply be copy/pasted from the YouTube-page, it’s all pretty theoretical, no?
Well here you are, a simple bookmarklet that will display the LYTE-code when you’re on a random YouTube video page:
An entirely different type of 3rd party content is Flash video, especially YouTube embeds, but there are a number of indicators that these indeed do impact performance as well:
opening a page with embedded YouTube can take some time when on dialup (or mobile data)
YouTube-heavy pages tend to slow down older computers (flashblock or adblock anyone?)
Facebook doesn’t really embed YouTube by default, but uses a placeholder with a thumbnail instead that is replaced by the embedded YouTube only when clicked
Google Webmaster Tools “Site Performance” seems to sometimes single out pages with YouTube embeds (e.g. stating that there is a DNS-resolution overhead)
There’s good and bad news in those figures. As could be expected the YouTube Flash embed doesn’t impact the rendering of the base page. But 2.6 seconds and 312KB just to display 2 video’s a visitor might not even bother to look at (I bet that the click-rate for embedded YouTube video is somewhere between 2 and 20%), that’s … sub-optimal?
So I threw some JavaScript at my computer to build an alternative to the default YouTube embed, the main goal being to build a Flash-less initial view with only a few lines of html/javascript which at some point people could copy/paste in their site just like they do now. And LYTE (Lite YouTube Embed) came into the world.
(base) download complete: 0.324s for 4KB (which is marginally faster)
start render: 0.363s (again marginally faster)
full page download complete: 0.803s for 35KB (leaner, meaner and faster!)
The code that would have to be copy/pasted (multi-line for clarity): <div class="lyte" id="gnDh6PqWqD8" style="width:480;height:385;"><noscript><a href="http://youtu.be/gnDh6PqWqD8">Watch on YouTube</a></noscript> <script>(function(){d=document;if(!document.getElementById('lytescr')){lyte=d.createElement('script');lyte.async=true;lyte.id="lytescr";lyte.src="http://futtta.be/lyte/lyte.js";d.getElementsByTagName('head')[0].appendChild(lyte)}})();</script></div>
The nitty-gritty (do skip if you’re not inclined to get aroused by technical details): this code attaches (a minified version of) lyte.js to the page’s head. The real work is done in that javascript-file: get all divs with class-name “lyte” (with a hack for friggin’ IE inlined), use the videoid which is in the divs’ id to fetch the thumbnail and title from YouTube, display these in a fashion which is very YouTube-like and add an onclick eventhandler to replace the fake with a real player when clicked (and remove the eventhandler to clean things up).
So using LYTE you can embed YouTube in such a way that the amount of data, the total download time and the total rendering time are significantly lower, without loosing any functionality.
And this -to conclude this long post- is what LYTE looks like (soundtrack by Nôze -- “Meet me in the toilet”, it’s Friday after all);
