15,000–20,000 Channels: Claims of such high channel counts are associated with IPTV services, which are unreliable, low-quality, and most likely not legal.
Local Channels Nationwide: No legitimate service provides local channels from across the country due to broadcast rights and technical limitations.
Watching All Dolphins Games for $40/Month: Watching all Miami Dolphins games (in-market and out-of-market) requires multiple services when accomplished legally (e.g., Sling TV, Paramount+, Amazon Prime, NFL Sunday Ticket), costing a lot more than $40/month. An IPTV service at this price may offer some games but is unlikely to provide consistent, legal access to all games due to NFL blackout policies
You start searching for illegal services, you're going to find them and hopefully get caught doing so...