if you use 'spring boot embeded server ', please make the following changes about nextrtc-example-videochat

[mslosarz]

I've changed parent pom version to this given by you.
I changed index.html url to localhost not to ws://localhost:8080/signaling but to ws://localhost:8080/videochat/signaling (I'll create branch only for spring embedded server and there your fix will be applied)
I didn't modify SampleWebStaticApplication

If you're still interested in this library you should take a look of latest version I've gathered all logic connected with spds exchange to one class (ConnectionContext), so it'll be easier in analyse :)