anybody know any podcasts or good youtuber channels that utilise the porteno accent
There are lots of them. It depends on your interests. Here are two YT channels that I follow:
For example. Mandarin Lab is the channel of a Chinese young woman raised in Argentina:
Japatonic is a channel by an Argentinian man living in Japan: his family came originally from Japan
but his main language is Rioplatense Spanish:
Mil gracias!! Buena data!