Could you send me the txt file you are talking about?
My guess is that your regional settings (like decimal separator and whatnot) are slightly different than presenter had.
p.s. what video?
The video is this: Cross-database Joins | Tableau Software
And the files are the ones available below the video: One .xlsx and one .csv.
As Dmitry below suggests I suspect some sort of regional setting - but where?
And finally - unless my regional settings are completely unique, supposing a frictionless process is perhaps misleading.
Thank you for your replies
Consider me educated