The following is a ranking of videos on Youtube related to the Ukulele according to the number of clicks (no critical appraisal intended):

1: Somewhere Over the Rainbow
Israel “IZ” Kamakawiwoʻole
669.623.970 views since 2010

2: I'm Yours
Jason Mraz
450.720.618 views since 2008

3: Hey, Soul Sister
Train
186.668.951 views since 2009

4: House of Gold
twenty one pilots
136.724.024 views since 2013

5: Can't Help Falling In Love
Tyler Joseph
114.944.661 views since 2012

6: I Don't Know My Name
Grace VanderWaal
91.373.743 views since 2016

7: I'm Yours
???
69.908.833 views since 2009

8: Hey Soul Sister!
Aidan James
20.258.876 views since 2010

9: What Are You Doing New Years Eve?
Zooey Deschanel & Joseph Gordon-Levitt
19.732.439 views since 2011

10: Mere Samne Wali Khidki Mein
Karan Nawani
19.288.867 views since 2017

(As of/Stand: 06.01.2019)