The skills you should know of how to make money online by sharing videos at YouTube, it is very simple but you always forget to do.
do not upload videos with copyrights to YouTube, unless you are the owners of the videos
edit your videos' title correctly, what are your videos' contents?
write a description for your videos , it is better 100-300 words, the longer the better. trust me, it will be works effectively.
add tags related to your videos for example, I upload a video about my dog, I will add many tags related to this video, such as: dog, pet, pet dog, pet food, dog food, funny videos, animals...
