Mouad

If you want to embed YouTube videos in your posts but don’t want to copy the embed code every time, this plugin is here to help. 
This plugin integrates with the default WP editor (TinyMCE) and creates a YouTube button that can be easily used to embed YouTube videos. 
The only thing you need to embed a video is its URL. Any URL will do the job (long or short format).
Enjoy this simple yet useful plugin which takes you one step towards easier blogging.

TinyMCE YouTube Embed

This is a plugin for the default WP editor (TinyMCE) that allows users to easily embed YouTube videos in their posts.

Sergey Biryukov

Samuel Wood (Otto)

In core ticket <a href="https://core.trac.wordpress.org/ticket/28206" rel="nofollow ugc">#28206</a>, the editor was modified to have a Link Text field instead of a Title field.
This plugin adds the Title field back.

Restore Link Title Field

Adds back the missing "title" field in the Insert/Edit URL box in WordPress 4.2

TinyMCE YouTube Embed vs Restore Link Title Field