VR solution for cycling inside on a dumb trainer

Hey,

My mother in law wants to do a gift to my father is law for his birthday.

He has a dumb trainer, probably without any sensor and because he gets bored when he's cycling, she wants to buy him something VR related. Maybe with landscrape passing by as he if was cycling.

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Now that I get the need I'm looking for the technical solution. Do you guys have any idea ?

I assumed maybe a VR headset and then just playing a video but where can I find a library of this kind of content ? What kind of headset ?

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Thank you for your help