Downloading videos from Instagram without proper authorization or consent from the content creator may violate Instagram's terms of service and copyright laws. However, there are third-party tools and websites available that allow users to download Instagram videos. Keep in mind that using such tools may pose risks such as malware, privacy concerns, or legal ramifications. If you want to download your own videos from Instagram, you can usually do it right within the app. For other people's content, it is best to respect their intellectual property rights and avoid downloading without permission. If you want to use someone else's content, consider contacting them directly to request permission.