can anyone give me advice on why retention rate is bad

[signal shadow]

I uploaded a video few days ago and the retention rate for that video is 25% which pretty bad can anyone tell me what i should do to make it more better i am attaching the link below

https://youtu.be/JH_fzD8pdmA

[lethal spear]

your accent makes its frustrating to listen to your voice and i cant understand what you are saying at all