Free apps support any resolution up to 1080p. With the Pro version, you can download videos at any resolution offered by YouTube, including 4K and 8K. To ensure the smoothest possible playback, the app provides support for a frame rate of 24, 30, or 60 fps. For complete immersion, spherical 360° videos are to be downloaded and converted. You might want to consider using a VR device such as Google Cardboard for optimal playback. You can convert any video to MP4, WebM, 3GP, or AVI format. The conversion can be performed during the download or using the local file conversion feature if it's already on your hard drive.