Quick question about installing dlc

I am using ps4. So if I purchased any dlc on my main PS4 account and installed it, would it be also available if I used another account like my brother’s? Or do I have to buy it again?

Moved to PS4 tech support.

I believe you can set your primary PS4 account in such a way that other accounts on the same box can use the content. Check out the ‘Family Sharing’ on the Sony support pages.