Do you use a carseat for your dogs , a dog cage or a dog seatbelt ?

And why do you use it ? What do you guys think is the safest ?
I'm just wonderin, everyone here on YT that I see uses some kind of carseat.
You can not get carseats for dogs here, only cages and seatbelts.
I use a plastic cage for Fido in the car with some things so I can strap the belt in and the cage is completily still, I bought some seatbelt for him but he got trapped in it and could have killed himself, he has seperation anxiety and he gets really stressed in the car if he's not in his cage or in my hands so when I put him in his seatbelt and I sat infront he went crazy and trapped himself somehow and could have strangled himself, so I'm not going to use a seatbelt again.