My YouTube kept stuttering and loading poorly on #Telekom in the evenings. Fix: selective policy routing on a #MikroTik running #RouterOS.
DNS FWD entries (youtube.com, googlevideo.com, ytimg.com …) dynamically populate an IPv6 address list. #Mangle marks new connections; a dedicated routing table sends them through a WireGuard tunnel to route64.org (AS212895) instead of the Telekom default route. Plus NAT masquerade into the tunnel, TCP MSS clamping and a FastTrack exception. IPv4 to YouTube targets is rejected → true IPv6-only.