My approach was a little different from the others. Here's how I did it -
Assuming 7 billion people in the world and YouTube makes up the majority of market share. So I'm going to assume at least 20% of the worlds population uses YouTube (this is a fairly large assumption so will leave this until the end and maybe come back). That gives us 7 billion * 20% = 1.4 users.
Out of the users, I will split them into categories of usage. Since I'm considering the whole world, I think the types of users are the following:
|Type of User ||% of all Users ||Number of videos uploaded/month |
|High Frequency users (YouTube usage is high)||40%||5|
|Hobbyist (YouTube usage is medium-high) ||30%||3|
|Casual (YouTube usage is low-medium)||15%||2|
|Occasional user (YouTube usage is low)||15%||1|
Assuming the number of users = 1.4 billion, then:
Per month you would get:
1) High Frequency users = 1.4(.4)(5) = 2.8 billion videos
2) Hobbylist users = 1.4(0.3)(3) = 1.26 billion videos
3) Casual users = 1.4(.15)(2) = 0.42 billion videos
4) Occasional users = 1.4(.15)(1) = 0.21 billion videos.
Adding all that up gives you 4.69 billion videos uploaded per month. To estimate the total number of videos on YouTube of all time, I would take into consideration the YoY growth of YouTube and have that as a growth %. But I do know that more and more folks are uploading content to YouTube.