This is CVTF is the gearbox oil and it must be changed every 6-7 thousand miles otherwise your gearbox would have issues, which could lead to thousands of pounds to repair. This is a honda insight 2010 model.
Thanks for you help, I’m agree with you 😁, the others videos are not helping enough, and yours was more helped to me, still you have mistake, but I can do it this time👏👍😉