A double question on Pi and Synology (opens in new tab)

The \.spk allows you to run Tvheadend on the NAS, but as the embedded kernel on the NAS doesn't support USB DVB cards and the NAS cannot physically host the Pi DVB HAT, it probably won't be helpful\. It's normally used with SAT\>IP and HDHomerun and IPTV or similar network based tuners\.