Another issue is that this will not work properly to reference variables:
You’re telling Thunkable to set the value of the app variable with the name provided from the value of app variable Database ID. What you want instead is the set app variable DatabaseID block at the top of the Variables drawer. Don’t use the set app variable " " block at the bottom of the Variables drawer.
As for the video, let’s back up for a moment… which row are you trying to get data from? Because the row id value you enter will depend on that. Is it the first row? The last row? A row # based on a search result?