An Instagram video downloader tool allows you to download videos from Instagram to your device for offline viewing. 

 Downloading videos from Instagram for personal use is generally allowed, but sharing or using them for commercial purposes without permission may violate copyright laws and Instagram's terms of service. 

 No, you don't need an Instagram account to use the video downloader tool. You just need the URL of the video you want to download. 

No, the tool can only download videos from public Instagram accounts. Videos from private accounts are not accessible.

 The tool typically supports common video formats such as MP4. Check the tool's specifications for more details. 

There is usually no limit to the number of videos you can download, but some tools might have usage restrictions or require a subscription for unlimited downloads. 

Copy the URL of the Instagram video you want to download, paste it into the tool's input field, and click the download button. The video will be saved to your device.

 Yes, most Instagram video downloader tools are compatible with smartphones and tablets. They can be accessed via a web browser or a dedicated app. 

 Many Instagram video downloader tools are free to use, but some may offer premium features that require payment. 

 It is generally safe to use, but make sure to use a reputable tool to avoid malware and ensure your privacy. Avoid tools that ask for unnecessary permissions or personal information.