This basically means that you cannot enjoy services like Netflix, Hulu, Amazon Prime etc. in High Definition 1080p/2K.

Here you can see that the security Level is L3 so we can only stream videos at 540p i.e SD videos for the above mentioned services. I don't know why Nokia didn't get the Widevine L1 certification on their flagship device.
Comments
Nokia 8 has relevant certification
I'll contact support and ask them why not/can they patch it?
The 5T needed a recall program to have it fixed. Quite honestly I'd expect Nokia to take a support ticket request to fix a Sirocco if its sent to them.
https://devicereport.youtube.com