Thoog_10

Rather than embedding video after video on a page or post, this plugin allows the user to consolidate those video embeds into a list that plays within one div.
<ul>
<li>This lets the user keep all their video embeds in one place, the Async Vid List settings page.</li>
<li>The presentation is more aesthetically pleasing to the viewer.</li>
<li>Only the video that is clicked on is loaded.</li>
</ul>
Multiple lists can be used on any page or post (or even sidebars) using the shortcode and the list ID.
The CSS is intentionally kept simple – feel free to customize it per your theme.
This plugin only uses one row in the wp_options table, so there is no database bloat.

Async Vid List

Lets the user create lists of video embeds that load and play asynchronously in one div

shawfactor

If you are sending large volumes of emails this is the plugin you need.
Generally wordpress emails are best sent by a third party, like gmauil or Sendgrid. But connecting and sending a large number of emails to third parties will slow your visitor experience down.
Unless those emails are sent in the background. This plugin does that.

LH Email Queue and Log

LH Email enables you to queu your emails so they are sent asynchronously.

Async Vid List vs LH Email Queue and Log