Downloaded videos aren't yours forever. Crunchyroll requires you to connect to the internet periodically to verify your subscription. If you stay offline for an extended period (usually 30 days), the license for your downloaded videos will expire, and you will need to re-download them.
For anime fans, the ability to download episodes for offline viewing is a game-changer. But if you are scrolling through the Crunchyroll app on your phone or looking at the website on your laptop, you might be scratching your head. Where is the download button? Can you do it on a computer? how to download on crunchyroll