C N Cartoon video 

KN Cartoon: Professional animated content."
"KN Cartoon: Quality cartoon videos."
"KN Cartoon: Focused on animation."
Slightly More Descriptive:

"KN Cartoon: Delivering professional and engaging animated videos."
"KN Cartoon: Your source for well-crafted cartoon content."
"KN Cartoon: Creating concise and professional cartoon videos."
If you want to add a hint of what type of cartoons:

"KN Cartoon: Professional animated stories." (if you tell stories)
"KN Cartoon: Professional animated educational content." (If you make educational cartoons)
Key Considerations:

Clarity: It should be immediately clear that your channel is about cartoons.
Professionalism: The language should be clean and straightforward.
Conciseness: YouTube descriptions are often viewed on small screens, so brevity is important.