: The title of the television series (an FX horror-drama created by Guillermo del Toro and Chuck Hogan). 4x08 : This indicates Season 4, Episode 8 .
: Refers to the audio codec used (Dolby Digital Audio Coding 3), which typically supports surround sound. The_Strain_4x08_WEBMux_Ita_Eng_Ac3_Earine
: Short for "Web Multiplex." This means the video and audio streams were sourced from a digital web service (like Hulu, Disney+, or iTunes) and "muxed" together into a single file without re-encoding the original quality. : The title of the television series (an