yes i agree that some words of Pothwari is difficult to understand but Pothwar is region in punjab and spoken in surrounding areas of rawalpindi, azad kashmir
I believe Potwari is spoken in Rawalpindi, Pahari/Mirpuri (which is pretty similar to Potwari) is spoken in Azad Kashmir, Hindko is spoken in Abbottabad & the Hazara regions of Pakistan. All three are similar to Punjabi in many ways, but also different in plenty of ways. Some might consider these three (Potwari, Pahari, Hindko) as a dialect of Punjabi, I wouldn't call it as such. There are even a few differences between themselves. Potwari is not exactly the same as Pahari, but both are very very similar.