I don't think Linus Sebastian is worth watching during the NCIX days because he always seem like someone who would spend the least amount of effort and say whatever is popular to get the most amount of views. As you can see in this video, a lot of the criticism he made on the Fairphone are really nitpicking and isn't fair (heh) at all.
For example, the phone thickness, which he measured with a caliper as a point, is not a metric most people outside of reviewers would care about, especially since most people puts a beefy case on their phone immediately anyways, and size is usually the main tradeoff with modularity.
Or their point about using a Qualcomm industrial chip instead of a Snapdragon chip as a point against Fairphone, when they have previously stated that it is to get a longer time of support.
That being said, having a long, uncut and unfiltered reaction video towards criticism by having the co-founder improv on the spot was not the smartest thing to do on Fairphone's part. He came off as defensive and completely unprepared in the video and failed to address the criticism effectively (with some easy rebuttals if he was given even a little time to prepare) effectively, which is not great for PR.
The video could be much more effective if they cut it down to half the length with an actual script. It's a YouTube video, there's no reason to do it completely live and unscripted.