I'm having this same problem. Every single recording since Monday January 15th 2018 I try to play or download on the app both gives me an Error::8001 notice and refuses to download, stating that it's unable to download the video at this time and that I should check back later, but when I try again (both hours and days later), the recordings still don't play or download. I'd appreciate any help from a Comcast employee!
Update: I have uninstalled and reinstalled the app. Unfortunately, any former downloads that I was able to keep on my device (an iPad) prior to Monday now say that they are on an "unnamed device" and are unable to be downloaded again, but this isn't so as they were formerly on the same iPad I deleted and reinstalled the app on (and, therefore, those downloads were deleted when I deleted the app). I am now unable to be download these episodes on the reinstalled app as well. Any help is welcome please! (And thank you in advance!)
I have escalated your issue to the Comcast Team available to these forums. Check back often for a reply in this thread or via Private Message from a Comcast Official Employee.
Hello Aking84. I can assist in troubleshooting this XFINITY Stream error you are receiving. I'd like to start with a review of the provisioning and entitlements of your account. Please send me a private message and include your full name, service address, and account number so I can access your account.