This is the most critical section. The legality depends on three factors: copyright, usage, and jurisdiction.
The Safe Takeaway: Download 9vids video only for content that you have permission to download, or that falls under fair use (education, commentary, criticism). Never re-upload or sell downloaded videos.
Before you start: Always respect copyright. Downloading videos for personal, offline use (e.g., watching on a flight) is generally accepted. Redistributing, re-uploading, or claiming someone else’s 9vids video as your own violates copyright laws and platform terms.
If you're tasked with writing a paper on a topic related to video downloading, here's a general outline: