Bergamini

Video Converter
Adds a link under the video embedded that allows to download or convert video to mp3. It supports Youtube and Vimeo at the moment but other portals like, DailyMotion, Facebook, Instagram will be added soon.
Supported WordPress youtube plugins
Currently these are a number of Youtube WordPress plugins that we support:
<ul>
<li>Default WordPress behavior without any wordpress plugin (mediaelements.js is not supported yet)</li>
<li>Smart YouTube PRO</li>
<li>Viper’s Video Quicktags</li>
<li>YouTube Embed</li>
</ul>
Supported Sources:
3sat, 8tracks, Archive.org, ARD, Arte.tv, AUEngine, Bandcamp, blip.tv, Break, Brightcove, CollegeHumor, ComedyCentral, CSpan, Dailymotion, DepositFiles, Dotsub, Escapist, Facebook, Flickr, FunnyOrDie, GameSpot, Gametrailers, Generic, HotNewHipHop, Howcast, Hypem, Ina, InfoQ, Instagram, Jukebox, Justin.tv, Keek, Liveleak, Metacafe, Mixcloud, MTV, MySpass, Myvideo, NBA, Photobucket, Plus-Google, RBMA Radio, RBMARadio, Soundcloud, Spiegel, Stanford OC, Statigram, Steam, Teamcoco, TED, TF1, TrailerAddict, Tudou, Tumblr, Tutv, ustream, Veoh, Vevo, Google Video, Vimeo, Vine, Wat.tv, Wimp, WorldStarHipHop, Yahoo, Youtube, Youku, ZDF
If you are using a youtube plugin that’s not supported please contact us and we will build support for it.
If you have any problems or suggestion please don’t hesitate and contact us on info@speeddownloader.com
Options include:
<ul>
<li>Customize appearance of link with custom css class</li>
<li>Customize the link text</li>
<li>Set the position of the link</li>
<li>Set the plugin to run on only on certain blog-post categories</li>
</ul>

Video Converter

Simple but it works

This Plugin Adds a link under embedded video's that allows to download or convert the video to mp3.

brasofilo

Hides the video area and show only the controls. 
Easy setup page with examples of the shortcode usage. 
Flash Only with no fallback to HTML5.
Check the <a href="https://wordpress.org/extend/plugins/audio-tube/screenshots/" rel="ugc">screenshots</a>.
<h4>Shortcode options</h4>
<ul>
<li>id -> Required! YouTube video ID</li>
<li>bar -> Progress bar (yes or no, default = yes)</li>
<li>time -> Timer (yes or no, default = yes)</li>
<li>tiny -> Minimal player, not compatible with Progress Bar (yes or no, default = no)</li>
<li>size -> Extended sizes (small, medium or large, default = small)</li>
<li>invisible -> Hidden player (yes or no, default = no)</li>
<li>auto -> Autoplay (yes or no, default = no)</li>
<li>loop -> Loop (yes or no, default = no)</li>
<li>theme -> Player color, will override plugin options (dark or light, default = dark)</li>
<li>start -> Start time in seconds</li>
</ul>
<h4>Localizations</h4>
<ul>
<li>Português</li>
<li>Español</li>
<li>Turkish (thanks to <a href="http://www.worldarchivetr.com/wp/hakkinda/" rel="nofollow ugc">ra.</a></li>
</ul>
<h4>Acknowledgments</h4>
Based on Navarr Barnier’s PHP script <a href="http://tech.navarr.me/code/youtube-audio-player" rel="nofollow ugc">YouTube Audio Player</a>. 
Released under GPL, you can use it free of charge on your personal or commercial blog.
Plugin waveform image by <a href="http://www.freeimages.co.uk/galleries/sports/music/slides/audio_waveform.htm" rel="nofollow ugc">freeimages.co.uk</a>

Video Converter vs Audio Tube