For those who might be interested, who need to refresh or complete their knowledge of the various tools, I discovered this site which is 
, it’s completely free, all the videos are on YouTube too but here no ads:
Formation Comprendre Git | Grafikart @GBoulvin with this one we’re going to become PR pros
Here’s something to fill rainy days… well, for those who are up north!!! 
@pierre-gilles, could we integrate these links into the dev section of the docs, what do you think?