[QUESTION] How do I watch a video as it is downloading?

[NightMachinary]

I know youtube-dl -o - "https://www.youtube.com/watch?v=BaW_jenozKcj" | vlc - streams to vlc, but I want the file to be saved locally for later use as well, without consuming double internet traffic.

[dstftw]

Either download directly to file and play that file or pipe through tee.

[NightMachinary]

@dstftw Thanks! You made my day ^_^
Here is the command for people who might enjoy it:
youtube-dl -o - youtube_addres | tee filename.mp4 | mpv --cache -
This allows you to treat the downloaded part just like a local file (seek, fast-forward, etc). You need to install mpv though (brew install mpv).