doc: update README.md

Author: olzzon

README.md

@@ -2,3 +2,21 @@
 
 Generate you own HTML overlay for your video stream.
 
+### Using CasparCG and Decklink with Internal Keying support
+
+run "kaleido-ember-win-x64.exe" on your CasparCG machine.
+Setup Decklink to use internal keyer (only some Decklink cards support this)
+
+Call command:
+play 1-11 [html] http://localhost:3000
+
+Calling layout from Lawo Ember viewer:
+run ember viewer.
+Add connection:
+localhost: 9000
+
+### Changing layout
+The htmloverlay-settings.json i located in your homefolder, and can be edited. Changes can be seen live either in CCG or in a browser using "http://localhost:3000"
+The file will be crerated with defualt layout at first run.
+
+