The particular subject matter doesn't matter, but too much on one topic is not very interesting in the long run.
The most important characteristic of a useful technical channel is documentation. The best channels that I go back to most often have written tutorials and/or Github repositories to accompany the video content. The very best of these keep their information updated, mark obsolete/deprecated information appropriately and provide links to suppliers and comprehensive parts lists of the items discussed in the videos.
The particular subject matter doesn't matter, but too much on one topic is not very interesting in the long run.
The most important characteristic of a useful technical channel is documentation. The best channels that I go back to most often have written tutorials and/or Github repositories to accompany the video content. The very best of these keep their information updated, mark obsolete/deprecated information appropriately and provide links to suppliers and comprehensive parts lists of the items discussed in the videos.
