times for logos

as i been researching an animated logo is fast all the logos  i been looking at take seconds. all the videos i looked at vary from the rly simple ones that can last only 5 seconds to the more creative ones that last up to 15 seconds so thats the time frame i m having to work with

my ideas

for my fda my client wants me to make the logo of their company animate.they have 4 ideas they want me to storyboard so they can decide what idea they want to go with so now i need to look into animated logos and were they can use their animated logo.