HEy there! I'm 14 (or at least for the next few weeks/months) also and got into this field of hobbism a few years ago. Heres what yoou should look for in a laptop for video editing:

Atleast 2.8 GHz Processor Petnium/Athalon or better (nothing lower)
1GB RAM, Dual Channel preferable
200GB Hard Drive, video files are large
Dual layer DVD burner running at 16x (make sure it supports DVD+/-r/rw)
17 inch or larger LCD display
TV out (S-Video, RCA standard, what ever)
IEEE 1394 (AKA firewire, iLink DV out, DV terminal)
USB 2.0 ports (duh)


Thats off the top of my head while doing some animation so pleas forgive me if its a pid scarse.