This April 2017 video from Portugal says about itself:
European Bee-Eaters Nest Building
As you can see, they are not exactly in a rush. It takes around 20 days to complete a nest which is about 1m in length with a chamber at the end for the female to lay 5 to 8 eggs.
European Bee-Eaters are known as Belharuco in Portugal. Captured using the Bushnell NatureView Cam HD Max (Live View).