Here are a couple of steps to get more viewers:
1. Decide what your main selling point is. Is there a particular move or trick you do better than anyone else, or have you created something unique? Do you have an interesting and original presentation for a particular trick? Or maybe there's something else entirely that you think makes you special.
2. When you've decided what that thing is, make a video showcasing it to the best of your ability. If it's a single move, show it off from several angles, and in context. If it's a trick, film several performances of it and edit them into a video. You get the idea.
3. Post the link on every magic forum you can think of, and on your Facebook page, Twitter feed or whatever you've got, humbly asking for constructive criticism. Even if you think that your video is the best thing ever, don't tell anyone that. Act as if you think you've got a long way to go, and people will take more kindly to you. If there are any magicians who have similar work, find their email address, and send them the link directly, asking for their comments and critique.
4. If anyone comments favourably on your video (which most of them should, as, if you've followed point 1, the video will be showing off something unique) then contact them individually, thanking them for their comments and offering your own constructive criticism should they ever require it. Then, as if it's a throwaway final thought, tell them you'd be very grateful if they'd subscribe to your channel, and you'll return the favour if they want you to.
5. When you've got this core of subscribers, keep up the output. It's probably best to have three or four ideas for videos ready to go, so that you can release one every couple of weeks. If it's too long between videos, then people will forget about you. Each time you release a new video, follow this process, remembering to always be humble about it, and always personally thanking those who make favourable comments. After you've released four or five videos, following this process each time, you should have a decent number of subscribers, and then it might be time to go for the Q&A!
Hope that's useful.