Update README.

trekhleb · trekhleb · commit 9081de3dedd5 · 2018-04-24T15:41:06.000+03:00
diff --git a/src/algorithms/string/levenshtein-distance/README.md b/src/algorithms/string/levenshtein-distance/README.md
@@ -43,3 +43,4 @@ three edits:
 ## References
 
 - [Wikipedia](https://en.wikipedia.org/wiki/Levenshtein_distance)
+- [YouTube](https://www.youtube.com/watch?v=We3YDTzNXEk)

Original file line number	Diff line number	Diff line change
`@@ -43,3 +43,4 @@ three edits:`
`43`	`43`	`## References`
`44`	`44`
`45`	`45`	`- [Wikipedia](https://en.wikipedia.org/wiki/Levenshtein_distance)`
	`46`	`+- [YouTube](https://www.youtube.com/watch?v=We3YDTzNXEk)`