From 144p to 4K or even 8K, a robust downloader lets you choose quality. The i--- 6buses tool probably offers MP4, WebM, and FLV formats.
Downloading videos from the internet involves complex copyright laws. i--- 6buses Video Downloader
The "6buses" name might be a gimmick. There is no industry standard "bus" count for download speed. It could simply be a rebranded version of an open-source downloader with a malicious twist. From 144p to 4K or even 8K, a