Any recommendations on proxies for yt-dlp?

[wweevv-johndpope]

I looked at this. - but doesn't work

https://brightdata.com/cp/zones/residential_proxy1/edit

youtube-dl  --proxy http://username:[email protected]:22225 --no-check-certificate  --socket-timeout 30  https://www.youtube.com/watch\?v\=6jcFbpxZKA0  --dump-json

WARNING: Unable to download webpage: <urlopen error Tunnel connection failed: 403 Forbidden>
ERROR: Unable to download API page: <urlopen error Tunnel connection failed: 403 Forbidden> (caused by URLError(OSError('Tunnel connection failed: 403 Forbidden')))

using yt-dlp

WARNING: [youtube] Unable to download webpage: <urlopen error Tunnel connection failed: 407 Zone not found>
WARNING: [youtube] <urlopen error Tunnel connection failed: 407 Zone not found>. Retrying (1/3)...
WARNING: [youtube] <urlopen error Tunnel connection failed: 407 Zone not found>. Retrying (2/3)...
WARNING: [youtube] <urlopen error Tunnel connection failed: 407 Zone not found>. Retrying (3/3)...
^Z
[1]  + 34789 suspended  yt-dlp --proxy  --no-check-certificate --socket-timeout 30  --dump-json

there's a mention in docs - for source-ip in the proxy setting - but I'm not clear what this means / or if I need it.