How can I make these types of thumbnails?

[goku786]

hey guys

does anyone knows...

How can I make these types of thumbnails?
https://www.youtube.com/user/GravityTrainingSol/videos
Thank you.

 

[koulde]

That’s commissioned artwork

 

[goku786]

That’s commissioned artwork

can you please explained more!

 

[Walterwhit]

that’s handmade using digital pencil i guess

 

[RoyalCandy]

Idk how does he make that but its pretty rich thumbnails, man just look at the views Amazing!!

 

[koulde]

can you please explained more!

Like walter mentioned its digital artwork since the mascot is the same and if this is a niche channel then they either commissioned this off via upwork or fiverr or any other freelance platform; or its done by the creator which is extra work and time.