Translation:My older brother is that tall boy there in the back.
In regard to the last question then do you need to specify older or younger brother then in Hungarian?
In practice: yes. The two most often used ways of talking about siblings is either specifying both gender & relative age (báty, öcs, nővér, húg), or not mentioning either (testvér.) Alternatively, you could use fiútestvér/lánytestvér (boy/girl sibling, ie brother/sister.)
Rarely you might encounter fivér (brother.) Also, nővér can be used as sister without specifying age. These two come up usually when you talk about a group of people, for example, the Wachowskis were known as Wachowski fivérek, then they became Wachowski testvérek, now they're Wachowski nővérek. (They are the people who made The Matrix.)
My ELDER brother should be accepted. We don't know if there are more than two