Firefox may be using the object (doesn't have an ActiveX classid for IE that would prevent this) instead of the embed and the object doesn't have a data attribute and a mime type.

This should work:

<table WIDTH="770" CELLPADDING="0" CELLSPACING="0">
  <tr VALIGN="TOP">
    <td VALIGN="top" ALIGN="left" width="463">
<object WIDTH="340" HEIGHT="193" DATA="http://www.youtube.com/v/N6GvuO_9tLY?fs=1?amp;hl=de_DE" TYPE="application/x-shockwave-flash">
      <param name="movie" value="http://www.youtube.com/v/N6GvuO_9tLY?fs=1?amp;hl=de_DE">
      <param name="allowFullScreen" value="true">
      <param name="allowscriptaccess" value="always">
    </object>
</td>
    <td VALIGN="top" ALIGN="left" width="403"></td>
    </tr>
</table>

Sorry to say, it does not work. Same as before: works locally, but not when published.

More ideas?

This does works for me.

Do you have a web page with this code?

data:text/html;charset=utf-8;base64,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

No. I've got:

<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">

Check my website at http://www.varf.se/s11urania.htm in various browsers.

That page work fine here on Linux with Firefox and Google Chrome with the current code.
I can't test with IE, but it should work in IE as well.

<object WIDTH="340" HEIGHT="193" DATA="http://www.youtube.com/v/N6GvuO_9tLY?fs=1?amp;hl=de_DE" TYPE="application/x-shockwave-flash">
  <param name="movie" value="http://www.youtube.com/v/N6GvuO_9tLY?fs=1?amp;hl=de_DE">
  <param name="allowFullScreen" value="true">
  <param name="allowscriptaccess" value="always">
</object>

Reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

• Press and hold Shift and left-click the Reload button.
• Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
• Press "Command + Shift + R" (MAC)

No, no success. FF refuses to show the video. I'm lost.

Is there perhaps a conflict involving Silverlight, and Adobe Flash?

I know getting frustrated never helps, but why can't every browser present every webpage as it should be presented? I have little time for stupid problems like this.

Do you at least see an image of the video or is it entirely blank (black)?

Did you try this in Safe mode?

• https://support.mozilla.org/kb/Safe+Mode

Create a new profile as a test to check if your current profile is causing the problems.

See "Creating a profile":

• https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues

• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Safe mode worked. Video showed up on the black bottom where I want it.

All Add-ons are inactivated, all Plug-ins are still active.

So, all I can do is to turn add-ons on/off one by one to se which one causes the problem?

Need I worry that other users have the same problem?

If it works in Firefox Safe-mode then disable all extensions (Tools > Add-ons > Extensions) and then try to find which is causing it by enabling one extension at a time until the problem reappears.

Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

You can also try to disable hardware acceleration in Firefox.

• Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Success! Baaad add-ons.

The villain IS Google Disconnect.

Anyone who knows why this baby effect embedded videos from YouTube?