Notice that the desc field has HTML within it. What would be the HTML template file such that the first 2 fields and date are rendered as normal in Splunk Web, but the desc field's rendering as interpreted HTML? In other words, instead of showing the raw HTML text, the field is interpreted by the browser and rendered by it.
If you're using a relatively recent copy of Sideview Utils though (2.2 or greater), then you can use the Multiplexer module with an HTML module, instead of the EventsViewer. The advantage there is that you don't need any custom code at all - it looks like this:
<b>this is some static HTML, followed by the HTML in the desc field on the next line</b><br>
Multiplexer is definitely a peculiar module. It's not a module anyone needs or uses very often. In fact you can probably get by without ever using it for anything ever. But when you do need it for something, it can be crazy useful. What it will do in this simple example, is create a copy of that HTML module for every row in the current search results, and in each of those cloned HTML modules, the $desc$ key will have the value of the $desc$ field in that row of the search results. You can also multiplex any number of modules so you can next complex configs with PostProcess and JSCharts and really powerful config in there if you ever need it.
There's a decent amount of docs dedicated to Multiplexer in Sideview Utils itself under "Module Documentation > Advanced Modules > The Multiplexer Module"