It depends on how spammy your video is.
You’re saying that it’s helpful and that’s why it got an inquiry.
Well, it depends on how aggressive you are in calling the viewer to action.
You have to remember that people on Reddit tend to be very sensitive about any kind of self-promotion.
As much as possible, you should post videos that have no call-to-action, or even a URL or domain at the bottom—it should just be pure info.
What you should try to do is to have people trust your username.
That is what you’re really trying to brand.
And eventually, when it comes time for you to set up your own subreddit or to share your own content, people will give you the benefit of the doubt.
But, if you’re just posting one promotional video after another, what happened in your situation isn’t a surprise at all.
So, do yourself a big favor.
Focus on building credibility and authority within your target niche, and then harnessing your positive reputation and high karma into promoting your subreddit.
So, on your subreddit, you post mostly self-promotional stuff but, from time to time, you post informative stuff.
The informative stuff you can cross-promote on other subreddits that you have a high reputation on.
Do you see the game plan?