8K Video Downloader provides different ways to download videos even they are private or are behind accounts. There are two ways to download secure/private/age-restricted videos with 8K Video Downloader.
Watch and Download
With this feature, you can browse, watch and download videos with a built-in browser. The interface is straightforward with all the control needed to control your browser over the YT website. You can right-click on any video link and choose the Download this video option to start downloading it.
Whats New
official site does not provide any info about changes in this version.
Homepage

https://nitroflare.com/view/DE97B4290F77072/8K_Video_Downloader_15.4.rar

https://rapidgator.net/file/35c92b56b9e8206d7c8c2ba3105db864/8K_Video_Downloader_15.4.rar.html