I found this this video while I was having trouble putting my baby to sleep and wanted to share it with you.
For my baby, it worked like a charm!
It was especially helpful, when we were on a trip and spent a couple of nights in a hotel (new environment for the baby).
This helped a lot calming the baby, so she can fall asleep in the new room.
Hope it works for you as well!
P. S. Travel video coming soon :)