Repetition is important to remember something. If a certain type of information isn't repeated within 30 seconds, it disappears. If it is repeated, it moves into working memory, where it will stay for an hour or more. If it isn't then repeated within this period, it will again fade. The important think here is the time frame; don't expect to repeat something quickly three times to remember it, repeat something over an extended period and it is more likely to be embedded in your memory.
Check out this brief presentation to embed this post in your own memory, then repeat what you see, then watch it again in 60 minutes.