Hi,   The WYSIWYG editor in community is locked down and changes are limited but you can change a fair bit check out what buttons you can edit in editor however the one missing is the "templates" feature, ive used this in a drupal site and allows you to populate with elements such as what you need and makes it point and click to insert the code snippet.   The only thing i can think of which "may" help would be to use macros, you could populate the macros with a html code and try and use that to insert your html snippet.    Good luck  ... View more