I already found the solution in another thread.

Hi, how can I set channel banners. When I edit a channel I can't see any option there to do this. I am the server owner and the server is on version 3.9.1 and the client on beta18.

Hi,
today after I first logged in TeamSpeak 5, my TeamSpeak Client in Android says:
We updated our myTeamSpeak services.
Make sure to update your TeamSpeak app.

And I can't log in anymore on...

That would be really nice if that would be part of one of the next updates. If you could set as server admin which server wide messages would be displayed and which not, for example I have two...

At the capture profiles when I rename the capture profile named "Default", close the settings and open them again, a new profile called "Default" with default settings will be created. This don't...

In Windows Settings in Programs and Features at TeamSpeak it always shows the version that TeamSpeak was installed with first. For me it shows there version 3.1.6 even if I have 3.3.0 Beta installed....

Thank you, it works with your solution, as channel id you will need 0 and as path you need /, so for example:
ts3image://avatar_bihmkeccldipbnnfignofiffgobodnfdloljoogp?channel=0&path=/

But it...

Hello,

I tried to embed a user avatar as image in a channel description, but it won't work. It always displays this blocked icon or a file icon.

If I do it like an download URL I can download...