This is the key differentiator. Standard proxy sites are slow, riddled with pop-up ads, and often break after a few days. The "Exclusive" version implies:
Web proxies function as middleman servers that fetch the video data on your behalf. High-performance web proxies handle scripts effectively so video players do not break: youtube unblocked 77 exclusive
Fake unblocking sites may prompt users to enter personal credentials or Google account info to "verify" access. This is the key differentiator