Streaming videos

In order to stream files larger than 4gb i need to buy only the 64GB version of the WFD or wireless stick who support exFat and NTFS. is it correct?

NTF is not supported by any device regardless of capacity. If you need exFAT support you will ahve to purchase the 64GB device. 

another option is the wireless media drive who for my best understanding the battery life is 8 hours and the 32GB also support exFAT and NTFS?

NTFS is not supported with the Media drive either. All capacities do support exFAT though. Battery life is also better.