Why i cant upload my custom thumbnail?

[ElvanPlays]

I watched a video on youtube that it will take 30days to get custom thumbnails. I mean that ur channel must be 1monthy old to get it.

 

[Symixstur]

I watched a video on youtube that it will take 30days to get custom thumbnails. I mean that ur channel must be 1monthy old to get it.

probably this month i will get it

 

[ElvanPlays]

probably this month i will get it

Hopefully. i will get it end of the month hehe