add support for 'app passwd'

[257]

my understanding is that 2-step authentication is not supported. but i couldn't find anything about app specific passwd here. this should work with netrc just like regular passwd but i doesn't.

[jaimeMF]

I don't use it myself, so I don't know how well it works, but you should look to the --twofactor option. You can add it to your config file

[257]

twofactor uses, well, two factor authentication. that's different than 'app-specifit passwds' which you can use for 1 step authentication. these passwd(s) are different from your main passwd for google/youtube.

fyi:
right now i use netrc (isync uses it on my system as well) but in i'm thinking of moving to pass: http://www.passwordstore.org/

[257]

this is what i get:
ERROR: Please use your account password and a two-factor code instead of an application-specific password.

coming from here:
https://github.com/rg3/youtube-dl/blob/99209c2916753799e9c68e8d466c5253113f25bc/youtube_dl/extractor/youtube.py#L114

[AngryAnt]

Is this request under consideration? The flexibility and compartmentalisation of app-specific passwords would be quite a nice addition.

[MaximKraev]

👍 it is quite not practical to open an app and enter a code to watch a video every time.

[Forever-Young]

Works well if you specify --cookies param, and input 2-factor code one time, next time it won't ask

[Craquehead]

I'd also like to see this. I use google prompt instead of/in addition to google authenticator.

When I log in using my main google password, I get a prompt on my phone asking to authorize. Accepting the request does not work, nor does inputting the google authenticator code.

[yan12125]

Just tried it:

1. Using an App password to login in to www.youtube.com on Firefox does not work. It says "wrong password".
2. Using the original password and two factor codes works. I use TOTP.

youtube-dl mimics browsers. If App passwords do not work on browsers, it's unlikely they'll be supported in youtube-dl. Can anyone try (1) and check whether it's still working or not?

@Craquehead A possible cause for authentication failures might be wrong time settings. Either the time on the device running youtube-dl is inaccurate, or the time on your phone is inaccurate. AFAIK authentication won't work if time difference is more than a few seconds.

[257]

@Forever-Young cookies go bad ;)
what's really blocking this? the main reason for this is automation. i have a playlist imported from bbc; it gets updates per week and i pull the hole thing into my backup machine every month (more or less)...

[yan12125]

what's really blocking this?

When the last time I checked it, app passwords doesn't work in browsers. Does that work for you?