Add YT links

Author: andrei-punko

src/main/java/by/andd3dfx/numeric/AddTwoNumbers.java

@@ -26,6 +26,8 @@
  *   Input: l1 = [9,9,9,9,9,9,9], l2 = [9,9,9,9]
  *   Output: [8,9,9,9,0,0,0,1]
  * </pre>
+ *
+ * @see <a href="https://youtu.be/RKAeQ1o5pRo">Video solution</a>
  */
 public class AddTwoNumbers {
 

src/main/java/by/andd3dfx/string/IsSubsequence.java

@@ -16,6 +16,8 @@
  *   Input: s = "axc", t = "ahbgdc"
  *   Output: false
  * </pre>
+ *
+ * @see <a href="https://youtu.be/UbXVhH4NIuQ">Video solution</a>
  */
 public class IsSubsequence {