HTML Renders Locally from HD, but not when Served by IIS 10

I recently had to build a new web server after a power surge killed my 15 year old Dell server which was serving pages properly under IIS 7.5.

I spent a week working out many problems on setting up IIS 10, and thought I was out of the woods, but I discovered today that some elements of my pages are not rendering at all when served from this new server. However, if I open the page from the disc locally, it renders correctly.

This leads me to think that there is one or more remaining configurations I forgot to do on the server.

The stuff that isn’t rendering are things like navigation buttons and external embedded video links.

Code below:

(buttons that only render locally, but not when served by IIS 10)

[code]
<!–webbot bot=”Navigation” S-Type=”sequence” S-Orientation=”horizontal” S-Rendering=”graphics” S-Theme=”sonora” B-Include-Home=”TRUE” B-Include-Up=”FALSE” U-Page=”sid:1001″ –></font></td>
[/code]

(linked videos that only render locally but not when served by IIS)

[code]
<p align=”left”><b><font face=”Arial”>See it in action:</font></b></p>
<p align=”center”>&nbsp;
<iframe width=”560″ height=”315″ src=”http://www.youtube.com/v/w_wUCk1jBO0&hl=en&fs=1&” frameborder=”0″ allowfullscreen></iframe></p>
<p align=”center”>&nbsp;
<iframe width=”560″ height=”315″ src=”http://www.youtube.com/v/AfolcWik7pM&hl=en&fs=1&” frameborder=”0″ allowfullscreen></iframe></p>
<p align=”left”>
[/code]

I suspect this is a web server config problem, but it’s been 15 years since I last set this stuff up, and I cannot find any specific articles by searching which address this particular issue. I hope someone can spot this and say it was a simple matter to enable this or install that extension, etc.