Our AI software needs to analyze the entire video end to end to be able to generate text. It's been optimized over the years and works fast but do expect it to take 0.5s - 1s per 1s of video. This means a 1 minute video could take 45 seconds - 1 minute to transcribe. Press the button and do something else for a few moments, it'll be worth it, trust me writing captions from scratch is not fun and will take you 5x the time.