Block category: Common
The Common category includes the following blocks: Paragraph, image, headings, list, gallery, quote, audio, cover, video. The paragraph block is the default block type. It should not have any alignment of any kind. It should
Block category: Embeds
This post tests various embed blocks:
Media: Twitter Embeds
Really cool to read through and find so much awesomeness added to WordPress 3.6 while I was gone. I should take three weeks off more often. — Andrew Nacin (@nacin) April 3, 2013 This post
Post Format: Video (WordPress.tv)
Posted as per the instructions in the Codex.
Edge Case: Many Tags
This post has many tags.