I watched this movie because I'm contemplating walking The Camino, and while the movie was never entirely boring... it was surprisingly uninformative. The subtitle, a feature length selfie is the clue here. This is much more about the documentarian Martin DeVries, than it is about the Camino de Santiago. So while the movie contains a fair amount of delightful landscape footage of the route, it contains very little information of use to potential walkers. He rarely tells us where he is, and does not even share with us what dates his hike spanned.
And of course, there's no real drama beyond his knee hurting a bit, and him getting stuck in a barbed wire fence. The story, as much as there is one, is that of Martin's feelings and introspection as he spends 66 days walking. He's not an uninteresting or unpleasant guy, but there are no groundbreaking insights or great pearls of wisdom here either.
I found a couple of things frustrating, which lead to my low score. The camera he used had terrible image stabilisation, and bad distortion. And, probably as an editorial choice to support the "selfie" aspect, there is almost no record of any interaction with other hikers... but such interaction, in my experience, is one of the greatest parts of any through hike.
There's no real reason to watch this movie. It neither informs or entertains. The closing "scene" is a series of still photographs taken en route, and these tell a much more interesting story than the previous 90 minutes.