[Embed block] Add the top 5 specific embed blocks to the Block inserter list

[ceyhun]

Description

• Add the top 5 specific embed blocks to the Block inserter list:

  • YouTube
  • Twitter
  • WordPress
  • Instagram
  • Vimeo

• Will use colored versions of icons We finally decided to not use the colored versions of the icons (internal reference).

• Needs research: These are not necessarily the ones in the screenshot, should look into data to find out the top 8 most-used ones. The list of most-used providers was defined in [Embed block] Enable inline preview only for the top 5 most-used providers #3816 (comment).

Screenshot

[fluiddot]

I updated the title and description of this issue to match the list of most-used providers that was defined here.

The list is composed of the following five providers:

• YouTube
• Twitter
• WordPress
• Instagram
• Vimeo