Need your help guys with a problem that started a couple of weeks ago, i noticed that whenever i'm uploading something, say a youtube video, or if someone is remotely watching something on my Plex, i am unable to browse the internet anymore, it seems as though my uploading anything is completely using up all my bandwidth?

Never had any problems previously, and the only thing i've changed is to open a port on my router, because otherwise my Plex is inaccessible outside my network, though setting the router back to default doesn't get rid of the problem.

i've just had to wait for someone to finish watching a movie on my Plex to post this ffs

Any ideas please.

Thanks.