LingoEducation

With Lingo, you are never stopped by words you don’t know again. While you 
are browsing online, you can double-click on words you don’t know. Lingo 
will show you the meanings, sounds, and importance of the words. It’s a 
quick and easy way to build up your vocabulary and make reading fun!
Built on natural language processing technology, Lingo prompts users to 
learn new words and saves those to a word collection to be reviewed down the 
road. They can practice their words with automatically generated flashcards 
and quizzes.
<a href="http://lingoeducation.com/demo?utm_source=wordpress&utm_medium=plugin&utm_campaign=widgetplugin" rel="nofollow ugc">Try it here</a>.

Lingo Web Dictionary

Lingo Education turns every Web session into a chance to learn a language.

E-Learning expert

This plugin stores the video progress on browser and resumes video on re-visit, it supports Vimeo, YouTube, Wistia and JWPlayer. It works on Learndash lesson and topic pages. It supports multiple video please refer to screenshot 2.
Video player list:
<ul>
<li>Vimeo</li>
<li>Youtube</li>
<li>Wistia</li>
<li>JWPlayer (Coming soon)</li>
<li>VooPlayer (Coming soon)</li>
</ul>

Video Resume for LearnDash

This plugin stores the video progress on browser and resumes video on re-visit, it supports Vimeo, YouTube, Wistia and JWPlayer.

Lingo Web Dictionary vs Video Resume for LearnDash