I'm having trouble finding a way to add the dvr and firestick(HDMI) app. I have roku premiere and in the settings it do not have the "tv input option" so what is an alternative way that I can add this?
Not certain what you mean. A Firestick is an Amazon streaming device. If you want to use one, you would connect it to another HDMI input on your TV. Same with a DVR.
A standalone Roku device is just that, standalone that connects to one of your TV's inputs. You don't connect other devices to it.
Every time I go to the hdmi a screen pop up saying new accessibility feature and it says continue but won't let me press it
Are you describing something on your TV? If so, telling us about the TV might help.