I want to create one visualisation but I don't have any ideas.... :/
As a marketing company we sent emails and SMS to our customers with one video link. Some customers open this emal, they click on the video link. They beginn to watch the video. And only some of customers watch the video to the end.
I have all numbers but no Idea how can I creat this customer journey.....
I believe what you're looking for is called a Funnel Chart Funnel chart .
There are several different ways to create charts like this in Tableau. I'd suggest searching both the forums and the web for "Tableau funnel chart" and find one that works best for your data.