US series called Young Sheldon nicely passes dull time on exercise machine

[GoodTaste]

Richard Dawkins tweeted 4hrs ago:
US series called Young Sheldon nicely passes dull time on exercise machine. Witty like Simpsons – not just contrast of solemn young genius vs sibs, but gentle satire on “normal” US family: fat football-coach father, airhead religious mother, brash, in-your-face grandma. Fun.
Source: Twitter

What does "exercise machine" mean here? How could TV series be on exercise machine? I guess it is metaphorical meaning getting excecised or experienced. I am not sure.
Plus, "sibs" mean "siblings" or "something alike"?

 

[emsr2d2]

It means that if you're on your exercise bike, rowing machine or cross-trainer, either at your own home or at the gym, and you're a bit bored, you can watch the show while you're exercising on those machines and the time will be less dull. Such equipment in many gyms have their own TVs and you can plug your headphones in and watch a TV show of your choice while you exercise. If your exercise machine is in your own home, it might be in the living room where the TV is anyway, or you might have a TV in the room you exercise in.

Yes, "sibs" means "siblings".

 

[Tdol]

I guess that he exercises for his health and watches stuff to pass the time. He is a slim and fit 80-year-old, with a sarcastic sense of humour.

 

[probus]

It's worth adding that sibs is used only in scholarly writing.(Dawkins is a professor of biology.) Strictly speaking, siblings are youngsters while sibs can be of any age, but in everyday usage we use only siblings, never sibs.

 

[Tdol]

The Oxford Languages dictionary used by Google add a second definition:

2.
ANTHROPOLOGY
a group of people recognized by an individual as his or her kindred.