Business card. What do u think ?

[bstylz01]

One vital thing you're missing: the QR code. Since your URL's are long and contain both letters and numbers, writing them up is time consuming and prone to errors. So just a simple QR code in the corner would make it much, much better. Scan the one below and you'll see an example I made.

Where do u make them?

 

[Wastelander]

Where do u make them?

qrstuff.com for example.

 

[Karac Cano]

Or you just change channel name to youtube . com/user/<name>