This Video will clarify all the basic understanding regarding 5G DL DMRS for PDSCH different configurations, PBCH & PDCCH, and it will also explain most of the use cases of PDSCH-DMRS-related parameters. The below is covered in this video.
1- DMRS for PDSCH Configurations and main parameters
2- DMRS for PBCH
3- DMRS for PDCCH
5G NR in Bullets
3GPP Reference TS 38.211~38.214 & TS 38.331