Can you use the Xfinity Stream app on Roku while using a legacy box?(RNG200n)

Can you use the Xfinity Stream app on Roku while using a legacy box?(RNG200n)

On demand recently stopped working probably because its an old box but I have recordings In don't want to lose. When I go to the Stream app to possibly watch on demand content, it is asking me to accept all these permissions about cloud dvr and I'm worried it will mess with my current dvr and shut it down permanently.

Anyone use an old non x1 legacy box and use the Xfinity Stream app on Roku?

Thanks pals!