If you're staying in a Disney property can you get in a hour earlier?

You can if Extra Magic Hours are scheduled for that morning at Hollywood Studios. Each day it is a different resort and sometimes the Extra Magic Hours are in the evening.

You can on certain days. You have to check the specific hours to see which days have Extra Magic Hours at which parks.

Sometimes. It depends on Disney's schedule you can check online and see if you can get in an hour earlier or stay an hour later

All of these answers are correct.

I depends on the extra magic hours, when you check in at your Resort you can ask the person who checks you in she will give you the hours.

I agree with them as well. They have early and later hours on certain days.

On certain days yes