I tried something similar for my elderly grandmother who's suffering with dementia. TV's the only thing that gives her joy these days but she struggles. I want

I tried something similar for my elderly grandmother who's suffering with dementia. TV's the only thing that gives her joy these days but she struggles. I wanted something like reminders and information to show on the screen next to the TV program and used a HDMI capture card along with a Raspberry Pi to essentially add an overlay to the screen but it was too finicky and the pi would often lock up (its nowhere near powerful enough). Ideally it needs a passthrough system that can resize the source input down a bit to fit a scrolling banner at the bottom and a sidebar that family members can remotely push messages to, or have scheduled reminders with a voice over. Common things we found needed reminders were things like remembering to drink, a reminder of someone coming round, reminders to go to bed, shower, clean your teeth, etc. I dont think anything interactive would be a good idea in this situation. The worst thing you can do with dementia patients is introduce something new to learn so it would need to be as frictionless as possible.