Drupal Commerce is popular amongst our members, because it's the most reliable way to build an e-commerce site with Drupal.

One of our members wanted to create a taxonomy of Countries, Provinces and Districts.

For example, you might choose England, then Yorkshire, then Leeds. Or you might choose Canada, then Ontario, then Toronto. You get the idea.

There are some sophisticated and flexible ways to add video to Drupal.

But, by far the simplest option is the Video Embed Field.

We recently published a tutorial explaining how to build a business directory with Drupal.