I have been using this 4K Video Downloader for years and it helps me a lot. I can save videos from YouTube for watching offline. The quality of downloaded videos are very good and it comes with subtitle in many languages you might need. There are options of video format including mp4, FLV, mkv,… If you need it in audio format, you can also choose mp3 or other popular format. Audio quality can be selected and you can also choose to download in original quality. I downloaded some youtube mv in mp3 and it works for car’s mp3 player without any problem.
The speed of downloading is very very fast and you can resume the downloading in case it is interrupted due to Internet connection or so. If you don’t want to occupied all the Internet speed, you have the option to set the download speed limit as you wish.
I really like the smart mode. Just copy URL from youtube and paste it to 4k downloader, the download will start automatically based on the smart mode setting you configured earlier. I can also download the whole playlist all at once!
If you have trouble selecting video downloader, this one is recommended. You can click the above picture to download it or use the link below