How many times can you watch a rented movie?

The only explanation from Apple, as you have already read it, can be found in -> Related Article: Rent movies from the Apple TV app

• You have 30 days to start watching your rental before it's deleted from your Library. After you start watching, your rental is available for 48 hours.

Get support from Apple directly -> Get Support or call Apple in your region see -> Contact Apple for support and service 

I am guessing, lol; because I wondered the same thing and still haven’t found a rock solid yes/no type answer, is that given the description from Apple states “available to you …” I take that to mean you can watch it multiple times during the 48 hours. I have not yet tried that yet, lol, I watch only til the credits barley start 😜 then if I wanted too watch it again I could. Good luck!