Unless your animation is an animated movie and requires to be lengthy it would be an effective decision to keep your clip short and concise. Which would not only help the viewer in getting past the important points of your video but help them gain relevant information as well. You online animation video requires to be to the point and simple, cluttering it with different elements would only make it less interesting and hard to understand for the viewer. It is best to opt for simpler methods than complex ones. Why do you think its important to keep an animation video simple?