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adding most popular deep learning playlist

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free-courses-en.md

@@ -200,6 +200,7 @@
 
 ### Deep Learning
 
+* [Complete Deep Learning](https://www.youtube.com/playlist?list=PLZoTAELRMXVPGU70ZGsckrMdr0FteeRUi) - Krish Naik
 * [Convolutional Neural Networks for Visual Recognition](http://cs231n.github.io)
 * [Deep Learning for Natural Language Processing](http://cs224d.stanford.edu)
 * [Deep Learning Specialization](https://www.coursera.org/specializations/deep-learning) (coursera)