Hi All,
I realize this topic is quite old, but I thought I'd post this here just in case someone needed it. I use squid in transparent proxy mode, and also Arlo cameras. I have found a way (though it may be temporary, we have yet to see) to get streaming from inside the firewall to work.
Steps:
Log-in to your Arlo account (arlo.netgear.com)
Open developer options (F12)
Click on a stream as-if you were going to watch it
a. At this time, you'll see an error which states that you cannot load the stream due to an SSL protocol error. Write down or copy that host name.
0_1536212797549_a1915064-f496-44b9-9b40-1e5252a0a753-image.png
Open your squid general settings, and scroll down to Transparent Proxy -> Bypass Proxy for these IPs and paste the host name from above.
Save your settings and test.
This is what I did to allow streaming of video clips, and I hope it helps someone else!