@RS-111 : Perhaps the following FAQ regarding the Ignite TV App will help:
https://www.rogers.com/customer/support/article/using-the-ignite-tv-app
All different types of programming are negotiated between the service provider and the rights holder separately. This includes:
SD
HD
DD5.1
Broadcasting
On-demand (often with time constraints)
Streaming
Etc.
So, although you can see a certain programme via the set top box, it may, or may not be available OD or streaming.