Best to get an idea of the game are the written AARs. Although I also very much like Youtube videos of the "Let's play" type - and watch a lot of them, I am not sure that this game would fit that model well; the reason is that most of the play consists of using tables (with icons) and clicking items on on them, and watching the results in tabular form (more or less). For example in naval warfare, you click on the planes you want to use, click on various options about them, click on the targets you want to hit, click on options to increase your chances or decrease the enemy's, eventually click on Ok, and watch a screen displaying the result, then rinse and repeat until one side has had enough. (Or at least that is what I understood from watching the video tutorial on that subject an hour ago). So wtchin the units move on the map is a very small part of the game, or of some parts.
Now perhaps a good communicator could gloss over some of the more intricate parts of the gameplay and focus on RESULTS using the map, and that may be worth a try.
Any new game that comes out usually has dozens of Youtube videos within a week or so (take for instance Command:air and naval warfare), but not a single one has yet appeared for this game. I am not sure whether this is due to the time required to learn the game or to the inherent difficulty of describing gameplay in a video.
I am not too worried about the loss of image quality on Youtube for the video tutorials. Many of the videos on Youtube support the 1080i format, which is crystal clear on my 27-inch monitor - I suppose it depends on how they are recorded.