Titles With First Letters As Capitals vs Regular titles?

I just saw a video with the title:

Elon Musk Explains His Thoughts On Warren Buffet | Joe Rogan Podcast Highlights

And i'm wondering, why did the author use a first letter of each word as capital?

It could've been written as follows but somehow author preffered the first option:

Elon Musk explains his thoughts on Warren Buffet | Joe Rogan podcast highlights

Does the first option gain more attention or is there some other scientific reason behind this? Or is it just a preference thing?