Rats! I'll test for the next few days and see how it goes. If I have to, I'll move to YTTV as it is the same price as Hulu Live TV. The one channel I'll lose vs Hulu Live TV that I watch is A&E, but that isn't a big deal to me or my family. The channels we really need are:
Animal Planet
Discovery
Food Network
Nat Geo Wild
Science Channel
TLC
I’d wait until after 11/9 before taking the plunge with YTTV. They are going to start forcing 2FA on that date and we’re not sure how it will affect Channels.
Gotcha. I did say I wasn't a programmer. 
I think it's safe to say most streaming services are headed in this direction eventually, and it's best to get ahead of the curve before Channels sees a negative impact to usage. I also use OTA for my locals, but that's only about 50% of the viewing in our house, and both YTTV and HuluTV have the widest TVE compatible channels I've found so far. Other option is to stay with FIOS and continue to use my cable cards, but that defeats the purpose of cutting the cable bill IMO.
For what it's worth, I just signed up for a free trial with Hulu + Live TV and had no 2FA or other issue adding it as a source to Channels DVR.
I happen to be running the Channels-TVE container on a Debian machine, and running the latest pre-release version. No idea if that matters.
This came up for me in the current discussion of Google forcing 2FA for recoverable accounts beginning 11/9. Provider - YouTube TV - #581 by markmarz
Hope this helps someone, or at least is a useful data point.
Oh, and I fully agree with @jator .. if at all possible, Channels is going to have to come up with a way to handle 2FA. I realize that may not be possible. But it does seem that's the direction providers are going.
I've got a second computer than I used as a backup. I'll fire it up and try and install Hulu to see if I'm getting the 2FA issue as well or if it's working. I'm running Mint Linux servers and install Channel via command line.
Fired up the second computer and tried to install Hulu. Failed for 2FA, I suspect they don't turn on 2FA for trial accounts maybe?
Possible. I'm not going to spend $65 to find out, because knowing won't help. You might try to see if you can find a way to register for a new trial. Maybe a different registration email?
Just for fun, last night I tried again to add my Hulu Live TVE source to Channels DVR and IT WORKED! No two step verification and the scan added 151 channels. If anyone is having this problem with Hulu, try it again and it might work. If not, I did contact Hulu support and asked to remove two step verification. They said it could not be removed, but it's not there now, so I don't know... 
Installed on my backup computer and can confirm as well the 2FA wasn't triggered this time. Seems like they have turned it off, even if temporarily.
Had an issue with authentication for YTTV using a dedicated non-recoverable Google account. Not strictly a 2FA issue but I think it may be of interest. Here's the post in the YTTV Provider topic:
