Based on the title, this refers to of the 2023 Indonesian psychological thriller series Katarsis (sometimes spelled "Katharsis").
The string "720p HDTV x264" describes the technical quality and format of the file: : The video resolution ( pixels), considered standard High Definition (HD). Watch Katharsis E06 720p HDTV x264
Rather than seeking unofficial "x264" downloads, you can watch the series through official platforms: Based on the title, this refers to of
: The video compression library used to encode the file into the H.264/MPEG-4 AVC format, which is the industry standard for balancing high quality with small file sizes. Official Viewing Options Based on the title