Up front: I am new to this StackExchange community, so please forgive me, if I am not stating my question properly.
Here's my problem i.e. question:
This weekend, I've tried to stream a little live acoustic concert to family and friends via YouTube. I hadn't installed any encoder (like OBS) ad that point.
I've got a quite reasonable DSL connection with a 100 MBit downstream bandwidth and more important 30MBit upstream.
I am using a MacBook Pro (2015) with 16GB ram.
For video I am using the the camera of the Mac.
For sound I am using a Rode microphone hooked up to a behringer xenyx 302 usb preamp, which is in turn connected to my MacBook.
The "concert" was supposed to take 30 minutes. But after about 8 minutes complaints started arriving from all kinds of different users (mobile, PC etc.) about interruptions, and decreasing sound quality. After about 20 minutes the quality got so bad, that most of the users had left.
It seemed to me like the outgoing signal got through a bottleneck somewhere and thus built up more and more like water that has to go through a funnel.
The problem is that I don't know, where to start analyzing. There's no such thing a test or analyzing tools for live streams. At least I haven't found anything.
So, if anybody could help me pointing in the right direction, I'd very much appreciate it.