To many questions not related to dvb hardware. 1. GPU in your i5 can decode H.264 SD and HD. 2. Multistream supported. But Bis TV usual dvb-s2 3. LibreELEC CvH builds with extra dvb drivers. 4. Yes. 5. Tbs 5927 if you need USB box. Multistream also supported by Si2183-based devices - TBS 6528, 6522,...