Also see the excellent explanation from Rami Mawas at http://rami.mawas.googlepages.com/gpctips#2

Adding Videos and Music

Take a look. It took a while but I have found the problem and the solution. Google's page creator at the moment does not support HTML 4.0 or one of newer standards anyway. As such it does not support embedded content. 

If you attempt to add embedded content through the HTML editor the creator removes it before the page goes live. So this may be an indication that google do not want there users to be placing embedded content on google pages. (If this is the case google, please contact me and I will remove both this guide and the sample page.)

To get around the problem I created my page without the content using google page creator. I then viewed the site in my browser and used the view source feature. 

Save this code to your computer and then find inside it where it was that you wanted to place your content. Place the embedded content in to the page. Save it on your local computer as a HTML file. Then upload as a file on to google pages through the page manager. This is done by clicking browse on the right hand side of the page manager underneath your list of currently uploaded files. 

This page is then available on the web, its address will be http://yourlogin.googlepages.com/filename.html.

Here is the code that I added to a page, to place a google video on it. 

<embed style="width:400px; height:326px;" id="VideoPlayback" align="middle" type="application/x-shockwave-flash" src="http://video.google.com/googleplayer.swf?videoUrl=http%3A%2F%2Fvp.video.google.com%2Fvideodownload%3Fversion%3D0%26secureurl%3DnwAAAJxVhjbezJ7Iux1Bw_Cb1SECtplwgRFShy5afWaiCuqwBqUt1Dx6xjFgJsrGPzeqQvb4HyOe_RK2tmtlnu6cMs-OF_-KpY3tJLbCgj-1d0uTUd9WXdSd0c1kXYTcUzMF5zcHN1LvYu7R0bDY5uAZsffW1z5vg3xBhGnnZSbUVROa9fBKyfRGgAY7qBwIOKVX2mRzJj5YZjAGw1OooejHGmY%26sigh%3DVOnQ7a-sH4cz43JG5yHWC_gsgTg%26begin%3D0%26len%3D41733%26docid%3D-3623576143531081352&thumbnailUrl=http%3A%2F%2Fvideo.google.com%2FThumbnailServer%3Fcontentid%3Db5e257f6d8774f16%26second%3D5%26itag%3Dw320%26urlcreated%3D1143344255%26sigh%3D5umlyaBRvt9nJg9oFDho4x6g3yc&playerId=-3623576143531081352" allowScriptAccess="sameDomain" quality="best" bgcolor="#ffffff" scale="noScale" wmode="window" salign="TL"  FlashVars="playerMode=embedded"> </embed>

(Google will give you that link off of http://video.google.com if you see content you wish to link to).

Click here for the end product. 

The downside of this is that you can then no longer edit the page using the editor. So I would suggest keeping a draft copy of the file that you publish in your google pages that you can edit, and just attach the embedded content at the last minute.  

If this isn't very clear enough then please email me and I will run through it in simplified steps on the website.

<Thanks Martin>