No, the Arc is a speaker, not a video device.

Not even with Alexa

The Arc still won’t play any video, it is a speaker. If you normally use an Alexa device to send a command to the Amazon cloud to play video on your TV, yes, the Arc is essentially another Alexa device. It sends your voice to the Amazon cloud to execute commands. In that situation, the Arc is merely a microphone connecting your voice to the cloud, there is nothing being ‘done’ on the Arc. 

Thats what I figured just can't figure out why its not going through the cloud.

Are other Alexa commands working as expected? 

Sonos doesn’t own what things are authorized to be done, that’s owned by Amazon. For instance, Amazon won’t allow a non-Amazon device to use a wake word other than ‘Alexa’, my guess is due to branding issues, but that’s a guess. I don’t have a clue as to how these blink cameras work, but if they use an Amazon device to send a video signal to your TV, then no, the Arc will not be able to generate that video feed. 

Ok ill check with Amazon thanks for comments