He made a speech(,) urging you should stop smoking.

He made a speech urging you should stop smoking.

-> I think that 'urging you...' should modify 'a speech' behind and it means 'a speech that urged you...'

He made a speech, urging you should stop smoking.

-> I think that ',urging you...' does not modify 'a speech' here and the subject of 'urging' in meaning should be 'He' here.

However, there is not much difference in meaning bewteen them, I think.

Or is there a difference in meaning between them and reponses will be different from each sentence or only either one is correct?

What do you navtive English speakers think?

Thank you so much as usual and happy new year!