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Watching videos, podcasts and lectures at faster playback speeds may save time, but research suggests it can come at the cost of learning and memory. In this article for The Conversation, cognitive scientist Dr. Marcus Pearce explains that while the brain can usually keep up with modest speed increases of up to 1.5×, faster playback can overload working memory, making it harder to transfer information into long-term memory. The effect is particularly pronounced in older adults, and although people may adapt with practice, speed-watching can also reduce enjoyment—highlighting a trade-off between efficiency and deeper understanding.