[pas]

That's probably something else. The server rate limits your client, or the ISP rate limits due to too many bursts, or the client needs to buffer more of the video.

To exclude cases you'd need to watch the network traffic with something like WireShark and look at retransmissions. If it suddenly shoots up and then packets start to trickle later but very slowly, then that could be bufferbloat.

But the 1 minute seems too long.

[emerongi]

The whole connection hangs - it's not the server or buffering and I doubt it's the ISP.

Reading more about it, you are correct about 1min being too long, therefore it's probably not (just) bufferbloat.