A lot of professional describers refer to time, such as _Now, a man walks into a room_, or mention things that break the fourth wall, so to speak. For example: _Our view changes, now showing a bald man, carrying a suitcase._
This is not present in your descriptions, which allows you to stay in character, without reminding the viewer that they are actually watching a video.

You try to add as much detail as possible, which is expected, if you describe something, however, it really shows that you have an intimate knowledge of what you are actually describing, which really helps. I'm not sure what it was, but I remember you explained a concept I wasn't familiar with at the right time. This is incredibly hard to do, because you wouldn't want to make it too detailed for people already familiar with the game you are describing, yet it should be easy to pick up for someone absolutely new to it. You really managed to find the right balance so far.

I was particularly pleased when you were talking about the landscape in your Witcher 3 video. People think that the interesting thing is what your character is doing, which is true 90 per cent of the time, but the scenery is just as important, especially on horseback.

You also focus on what can be seen in the distance, rather than just staying with the character, where it is relevant. This is great, for the same reasons as above.

Just to mention one tiny negative thing, it would be nice if what you were describing and the action itself would be a bit closer to each other. In one of your Fortnite videos, you inform the viewers that a shot rings out in the distance, but the actual shot happens 3 seconds or so later. As you are doing this realtime, I understand that this is not easy to sync up, but it might be something that can interrupt the flow of the video, since you already know what is going to happen in the future. To illustrate this better, imagine a scene from a horror movie, where the describer narrates: "Suddenly, a zombie jumps through a window and lands on a woman." A few seconds later, you hear the sounds for this, e.g. zombie moans, the woman screaming, glass breaking, etc. This is not going to be as scary anymore, its effect is lost because of the narration.

Having said that, I am really impressed, and I do think that these described videos are one of a kind. Thank you!