youtube's detection goes way beyond ip checks. they analyze watch patterns, mouse movement, scroll behavior, session duration, and even how the browser renders the page.
for bot setups, residential proxies are the minimum - datacenter will get flagged almost instantly. mobile proxies are better but still not enough if the bot behavior looks robotic. the key is making each session look human: randomize watch time, add natural pauses, scroll through comments, and don't just hit play and idle.
also rotate user agents per session and clear cookies between runs. even with perfect proxies, youtube will filter views that don't match organic engagement patterns.