[edit: stupid me, the uploader is CGTN, a well-known state propoganda channel]
During those protests there have been rioting and ransacking of the local Parliament with some expressing views that HK was not, or should not be, China. This can genuinely trigger feelings of patriotism and outrage.
The lastest protest seems to have been peaceful and to have respected the authorities' restrictions as much as possible so it may be that they have understood that using violence was playing into the hands of the other side.
French police are not exactly a beacon of friendship.
You can twist this however you want - you still can't take away the fact that HK protesters seem much nicer, better organized and well behaved.
And no, I have nothing to do with China/HK, never been there etc. I am just an impartial observer impressed with the HK protesters, thats all.