I watched a TexEx (I think it was anyhoo) about an investor and his missed opportunity with an online glasses business. He was talking about latecomers, procrastinators, and this pair of people he thought were not a good investment because they were late to the table and were procrastinating. He skipped on investing and someone else stepped in, but what happened was that this pair of latecomer procrastinators dominated and are now the biggest online glasses source.
The lesson was that by coming in later they could study what was already there and improve upon it. By procrastinating, as others saw it, they could mull everything over and make better design decisions. Which is what these glasses guys did, and they became very successful.
What I think you should do is look at what's there and think about how to do it better.
At the end of the day, the only way people are going to stop watching them and start watching you en masse is if you are different in some critical way. What that way is, I don't have a clue, that's a challenge for you.
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Idk, youtube is a complicated beast, people literally flock to people because they have a nice voice sometimes. Who knows. This is just something to think about - if you spend the next year experimenting something is bound to happen.
Good Luck