Personally, I enjoy the Youtube videos of creators like IC82, Sam'sTrains and SDJR7F88 and frequently use their videos when considering whether or not to buy a new locomotive. While forums like this inform me of any inaccuracies of the model, the videos provide a clear view of the product from all angles, the quality of its finish and details, demonstrate its slow speed running as well as its general running qualities and pulling power. That all helps me to reach my own conclusions about a model.
It is also worth noting that these YouTube channels contribute a large amount to the hobby without charging with the three mentioned above having over 90,000 subscribers combined and 60,000,000 total views. None of them claim to be railway experts as far as I am aware yet their videos are full of largely accurate information about the prototype which is fantastic for those new to the hobby - an audience that is very well served by them.
This particular review video should probably not be seen as representative of the usual ones from IC82. Having not made a video for over a year, he felt it necessary to acknowledge this and resulted in the longer than usual and less polished - although more 'real' - introduction. While he could have put this in separate video (something I think he mentioned that he would be doing), the time pressure of creating the video for a manufacturer may have come into play.