Ability to tokenize HREF links in email template editor

Our personalized video technology utilises query strings to identify a specific file to deliver when rendering an embeded video.  At the moment this is preventing us from using Gainsight to make use of our own product, so it's a significant problem for us. 

We would normally embed a video using HTML code similar to below:

<a href=“&vycustom_id=[customid]”]https://inserturlhere?vyemail=[email]&vycustom_id=[customid]” target=“_blank” title=“Vidyard Test Video”><img src=“inserturlhere?email=1&custom_id=[customid]”alt=“Vidyard Test Video” /></a>

As you can see, there are a couple of query string fields that we want to be variable values, pulled from a powerlist. These are 'EMAIL' and 'CUSTOMID'.

What we're looking for is the ability to add tokens into the HTML code. 

Thanks, 

Mat.