Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Brian loves watching animal videos online.  He watches a 4-minute video of cats.  He then watches a video twice as long as the cat video involving dogs.  He finishes up his video watching for the day by watching a video on gorillas that's twice as long as the previous two videos combined.  How many minutes does Brian spend watching animal videos?

### Response:
 Brian anaanza kwa kutazama video ya dakika 4, na kwa kuwa video ya pili ni mara mbili ya muda wa ya kwanza, video ya pili ni dakika 4*2= <<4*2=8>>8.
Kwa kuongeza muda wa video mbili za kwanza, jumla ya muda ni 4+8=<<4+8=12>>12.
Kwa kuwa video ya tatu ni mara mbili ya muda wa video mbili zilizotangulia, ina dakika 12*2= <<12*2=24>>24.
Jumla, video zote tatu zina muda wa dakika 24+12=<<24+12=36>>36.