In the Netherlands, we have several websites on which you can see where rain was falling the past few hours or so. Because August was a month with several interesting situations over here I decided to make a video of images provided by buienradar.nl.
I hacked together a few scripts for downloading all 5 minute images and adding a label since they originally lack a date. See this Github repository for the contents of these scripts.
The most important step is just to add all images together in a movie. This can easily be done with something like ffmpeg:
ffmpeg -framerate 60 -pattern_type glob -i 'labelled/*.png' -c:v libx264 -pix_fmt yuv420p ~/Bureaublad/out.mp4
Precipitation last August looked like this: