[malfist]

That works until the ads are hosted from the same domain name

[nazgulsenpai]

Then my little Celeron junker will also double as a router. Probably going to have do that anyway since YouTube on PS4 and Roku both serve adds from (what I assume are) hardcoded IP addresses.

[tredre3]

How would a router help you in that scenario? Is your plan is to selectively MITM streaming services with a proxy running on that same machine?