“You was” is incorrect and should not be used in English. You will hear people saying “You was” in different parts of the English-speaking world(Mostly in England in my experience).
Do not use “you was” if you are a non-native English speaker as people will try to correct your English.
先來看英文不好的菲律賓混血跟一個印尼人吵英文文法（＃
然後稍後加入的澳洲人跟瑞典人
咪：you was是昨天或這一兩天的事情，you were是好幾天前的事情
咪卡：？？？
我看到bbc？
一般人的一週：7天a week
不過老實講真的會no commentㄟ（（
比起講那些色色ㄉ，應該最不想給媽媽知道小時候被80ㄅ
漲知識
Do not use “you was” if you are a non-native English speaker as people will try to correct your English.