Some action cameras do record segments as short as 5 or 10 minutes, it's relatively easy to stick them all together in edit software.
I wouldn't spend too much time on it as you can get a very capable small video camera under $100 (or use your phone)

However what are the SD card specs, even 1080p video can be somewhat demanding especially at higher frame rates.
You could see how it performs at 720p which is still technically HD and looks fine on smaller screens.
SD cards are now relatively cheap even the fastest rated ones.
They'll typically outlive several devices so always best to get one at the top end of capability.

Having said that it's more than a little confusing, you used to just need class 10 but now they are moving to V ratings.
Look at the read/write speed that's what's important.100mb/second is where you want to be - or better.
If what you got from Walmart is below Class 10 it could explain it hanging up, as data can't be written fast enough when recording = crash.

One other thing - with sd card inserted cycle through menus to 'format' option.
This resets the file structure to what the camera expects to find.
It's good practice with all digital still/video cameras to use 'format' rather than 'delete' - more or less every time after you've transferred files to a computer if you want to keep them.