1.Go to http://ytjumpstart.com/ 2.Link an account to it (the site says you should link your personal youtube account. I strongly suggest to not do this, as you risk getting banned, lol..use a new one) 3.Search for a popular video, related to your niche, of course. Paste the link to "find people" on the site. This will make a list of all users who ever commented on the video. Depending on it's size, it might take a while. Something with 1000 comments is good. 4.Send the message with your youtube link Should sound something like "Hey, I saw you are interested in *keyword*, would you like to check my video about it? Also leave a comment if you enjoyed Thanks for your time!" 5.Wait. 6.Wait.. 7.Wait... 8.Bored? You can link up to 5 accounts Rinse and repeat. 9.Give a thanks to this post :]] Don't use the same video to gather new lists. It's a bad idea. Also, videos about half-year old are better than 4 years old for example.. more recent comments, most users still using the accounts. You should take in account that there are about 20% users who will never open that message. Also, if you haven't heard of this site: www.jumpstartviews.com It's the main site. Very useful ;> . You can get mobile views for free, or pay them if you will.