Getting started is straightforward, even for those who aren't particularly tech-savvy:

Kastor utilizes advanced downloading technology to split files into segments, downloading them simultaneously to maximize your bandwidth. This results in significantly faster speeds compared to standard browser downloads.

Kastor allows you to choose resolution. It generally detects available resolutions automatically (360p up to 4K, if available). One notable limitation is that older versions sometimes struggled to download video and audio separately for high-res formats (a method YouTube uses for 1080p+), often resulting in 1080p downloads defaulting to lower quality or requiring specific format workarounds. Newer updates have improved this, but it is inconsistent compared to top-tier competitors.

Kastor All Video Downloader is a "fine" tool for the casual user who just wants to grab a funny clip from YouTube to watch offline on an airplane. It serves its purpose without crashing.

For YouTube or mainstream platforms, switch to Seal (Android) or yt-dlp (PC) — they’re more future-proof.