If you see an app explicitly named "Jannat Toha Link Video Downloader" on a third-party APK site (not the Google Play Store), it is almost certainly malware.
Many "unofficial" downloader apps, particularly those offered as APK files on third-party websites, can contain malware. These programs may be designed to steal personal information, monitor your keystrokes, or compromise your device's operating system.
Ensure your devices have updated antivirus and anti-malware protection to help identify and block suspicious links or files. Conclusion
Third-party video downloader apps and websites are notoriously unregulated. Unlike apps vetted by official stores, these tools often serve as vectors for malware infections. Cybercriminals can embed harmful code directly into the software, allowing them to deploy trojans, ransomware, spyware, and adware onto your device without your knowledge.