Re: what these means ?

撚驚 is just 驚 (afraid of/scared of) with the vulgar intensifier 撚
[www.cantonese.sheik.co.uk]

影住, 無郁 means to record someone and telling someone not to move (唔好郁), I think

Here is 衝突 [www.cantonese.sheik.co.uk]

I'm not sure if your 補返句 should be 補番佢 or something, which would mean, to make up for something or to fix/repair/mend something

咁撚細膽 - This means that someone has no courage/is really cowardly

戇撚鳩 is [www.cantonese.sheik.co.uk]
which is quite offensive, but I see it fairly often on Youtube.

如果我解釋咗啲嘢唔夠清楚或者錯，唔該見諒。若果有其它更加識廣東話啲人發現我解釋啲嘢唔係完全啱嘅，敬請幫忙。