I do youtube because I've always loved the idea of entertaining people by doing something you're enjoying yourself. Every time I'm pulling a prank, whether it be out in public or just a small prank, I always have a mini adrenaline rush because you never know what the outcome is, and I love that feeling. Every aspect in my opinion is enjoyable, editing, recording, promotion of videos.
Although sometimes it is really difficult and depressing when your videos aren't reaching out to as many people as you anticipated, its always good to mix up the way you're trying to publicise your videos, and gaining new fans and viewers from doing so is very satisfying for me.
Also, when people comment on my videos saying they've really enjoyed it, or how I'm becoming better at what I'm doing in front of the camera, I feel a great sense of appreciation, which is what motivates me to continue making more videos. Theres so much adversity all over youtube, and I know that I, along with other small youtubers can be so successful if you keep uploading and doing what you're doing - that goes with anything.
Always take into consideration what people enjoy and want to watch on your channel, and work with those suggestions. Keep grinding