Also in mind try and use low competitive keywords .
Use The Correct Title
Use the correct title by also using the main keyword in the title which hopefully you have researched and make sure it is related to your video.
Keep it simple while making sure the main keyword is in the title.
Now write a good description using your keyword and try if you can not to just do one paragraph try put some detail in this. This is important to have the title and description with the keyword to help rank your videos. Also the more views and likes will also boost your rankings on your videos.
But these are just my way's some of you may not agree but it works well for me thats for sure.