Youtube algorithm Push

1500 people will watch your video, from countries where you want the audience from, the engagement you going to receive will push your video into the home site of YouTube depending in which niche the video is, only people who are interested in the content of the niche will see the post (targeted audience). 

Keep in mind those 1500 views are just there to push the video on the home site of YouTube from there the post should reach up to atleast 2k-10k people who like the niche you are in, if you only want USA people to see it it will only show up to USA people (tell the admin you only want USA) unless the post goes viral it will be shown worldwide by YouTube itself