I make a variety of gaming content on my youtube channel, come check out my channel and maybe drop a sub. https://www.youtube.com/Ahkezz
Have you considered commentary tracks like Optic Scump's videos (e.g. his 70 series) where the audience can see you on webcam and you actively talk on the mic whilst you play the game.
This might take some practice but it would be a lot more engaging than watching a standard match replay.
Also, another idea may be tutorials for certain gameplay aspects which may not exist, are outdated or done poorly.
Semscure was able to grow his channel through high quality MWR tutorial videos that didn't exist on YouTube: