Add comments prompting people to watch your video on the video watch pages of popular videos.
Use some but not all the same keywords as your competition in your titles as the ones related to popular videos that are using in their titles, descriptions and tags to wind up in the related videos arena of their pages. Post new videos on Thursdays or Fridays to get visibility on the weekend. Join the YouTube partner program if you can qualify. Important Use social media and web sites to submitpost your video links and imbeds and get the word out about the video to build links and embeds.
