This online tool will help to download from youtube and not only with a highest resolution.
They say about this tool:
SnapSave.io is a Youtube downloader, allowing you to download high quality Youtube videos: 1080p, 2k, 4k. Save and download any Youtube video in .mp3, .mp4 format quickly with the highest quality.
Support downloading any Youtube video on any device: PC, tablet, phone (iPhone, Android). Download Youtube videos online on a web browser, no need to install software.
