I don't think a solo video would be that hard. Set up your camera on a tripod, press record and stand there and do your thing when it's not windy. Try to make each take no more than 7 minutes, which is about the limit of my attention span for a Youtube video.
It really depends on what you are attempting to capture on video. If you are doing a gear review while just standing or sitting in your backyard or the local park then it is easy to do multiple retakes until you get it right.
On the other hand, making more in-depth videos of actually using your kit and gear out in the field and at the same time providing a decent narrative is much more difficult to accomplish when you are doing it all solo.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.
John Lubbock