I love watching people draw and paint. We're all so different and have so much to learn from each other. A great way to peer unobtrusively into an other artist's process is through YouTube.
Anne-Laure Jacquart is an exuberant French YouTuber and Blogger who is well-worth a follow. One of her videos popped into my subscription feed of Marc Taro Holmes painting on location. She films him painting a street scene in Alvor, a small fishing village in southern Portugal.
A few things I found interesting watching this video of Marc in action include:
the brush size
his brush grip
the board set-up
the range of colours he uses in shadows
"painting to looking" ratio
Marc Taro Holmes (YouTube channel)
Marc's watercolour supplies list (Citizen Sketcher)