2160p quality
2160p is commonly described as 4K when available from the source.
4K downloader
When a source video provides 2160p or 1440p formats, vidssave can show those quality choices in the downloader workflow.
4K video is usually much larger than standard HD video. It may also be provided as video-only, meaning the server needs to merge it with a separate audio stream to create a playable final file. vidssave is designed to make those format differences visible.
Not every YouTube video has 4K. Some videos stop at 1080p, 720p, or lower. Some videos expose 1440p but not 2160p. The full downloader reads the available source formats and shows what is actually available instead of promising every quality for every video.
For playlists, 4K ZIP downloads can be very large and slow. Use 4K only when quality matters more than file size and processing time.
2160p is commonly described as 4K when available from the source.
1440p can be a strong alternative when 4K is too large or unavailable.
Best quality selects the strongest available format path for supported videos.