Complex sentence: ViuTV is a Cantonese language general entertainment television channel in Hong Kong operated by HK Television Entertainment (HKTVE), whose parent company, PCCW, also operates IPTV platform Now TV and media streaming service Viu.
Split into simpler sentences: ViuTV is a Cantonese language generalist television channel in Hong Kong operated by HK Television Entertainment (HKTVE). The ultimate owner of HKTVE, PCCW, also operates IPTV platform Now TV and media streaming service Viu.