Big problems upload youtube videos

Can you post a link to the page/post which contains the video that does not work?

Make a test post (that you can delete later) with a YouTube video and post the link here, if you do not want to publish the draft.

OK, you have posted this HTML for video (without iFrame):
<p style="text-align: justify;">http://www.youtube.com/watch?v=mZxb5ZWW3_A</p>

Can you try ONLY this:
http://www.youtube.com/watch?v=mZxb5ZWW3_A

Please make new test post or check if the above link is present in your posts as it shows a 404 error.

Here is the html I find there:

<p style="text-align: justify;">Only with URL</p>
<p style="text-align: justify;">
<a onclick="javascript:_gaq.push(['_trackEvent','outbound-article','http://www.youtube.com']);" href="http://www.youtube.com/watch?v=mZxb5ZWW3_A">http://www.youtube.com/watch?v=mZxb5ZWW3_A</a>
</p>

Instead try posting only:
http://www.youtube.com/watch?v=mZxb5ZWW3_A

I posted that in a test installation and it works fine. If the above does not work in your site, try reverting to Twenty Thirteen theme and try again.

You are welcome!
Please mark the topic as resolved! 🙂