So you are making content that fits your channel thematically? You can always think about doing a second channel, but that's only useful if you need a closer connection to your audience, like in a 'behind the scenes'' style.
Second channels get like 1% of the views of the main channel. You literally have to build two channels at the same time. Growing one channel is already hard enough.
I would first try your video idea on your main channel, and see how it performs and what your audience thinks of it. If you get very few views, it's either a bad idea, or you are targeting the wrong audience which would justify a second channel.