There is no existing Yelp integration with ClassiPress, so this would certainly involve some customization on your part in order to do so. I'm not aware of anyone specifically who has done this, but essentially customizations are technically possible as our themes are not encrypted.
You can currently use embedded YouTube links in ClassiPress ads, but again, it would require some modification of the theme in order to have placement on the homepage as you describe. Our recommendation for anyone looking to customize our themes is that you create a child theme to save you losing these modifications in the process of an upgrade.
There is no importer tool for ClassiPress at this time, so migrating data from another site would currently involve some knowledge of mysql admin.
