Is it the DLink Omna? If so, that is the only DLink camera that has native HomeKit support. It can be viewed from the Home app on the Apple Watch or the HomeCam app for Apple Watch. If it’s not the Omna, not sure it’s possible since there’s no Apple Watch app.
If this feature is that important, any HomeKit camera feed can be viewed from the Apple Watch so you’d need a HomeKit supported camera.
Do you at least get rich notifications for Apple Watch with DLink? If so, that’s probably the extent you’d want to view camera footage on the watch. A quick glimpse if the camera spots motion. I use the rich notifications as a filter to see if I should bother opening the feed on my phone. For casual viewing, it isn’t great, as stated above, Series 7 or not.