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Advertising on youtube became relatively easy and cheap with an advantage of reaching only your target.
I'm new as an Indie too. However, I work with publicity so I understand a bit about reaching the right people for your product. Most of the time, It's really expensive and takes time. With the internet, you can achieve it, with no money or with a "small" amount depending on how you deal with the situation, which is can be very different in each situation.