Ok finally had some time to spend on this and I must say that I am fairly satisfied with the solution I came accross on this youtube video. Thanks to the poster I have now a good argument to put that tablet on my wall and add also my homeAssistant screen along. Solution is family friendly 
until Ring comes up with the ability to do it on Echo devices.
Instruction are pretty straight forward. Skipped the begining as I have a Galaxy tab but will order right now an amazon fire tablet to have a spare screen on my upper floor.
https://www.youtube.com/watch?v=xKJVVE4T7Gg
Seb