Add video about hardware options to documentation

docs/documentation/platforms.html

 				install driver software before this adapter will work correctly.
 				Consult the manuals for your hardware for more details.</p>
 				
+				<p>If you're not sure what hardware will work best for you, there is a video that covers all of the options and what's good or bad about each of those.</p>
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+				<iframe width="640" height="360" src="https://www.youtube.com/embed/CeB1x2yZufY" frameborder="0" allowfullscreen></iframe>
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 				<a name="compatability" />
 				<h2>Hardware Compatability Table</h2>
 				<p>The table below is a quick reference on what operating systems different hardware supported by Typica can work with. Please click on the device name and read the compatability notes <em>before</em> purchasing hardware with the intention of using it with Typica.</p>