That advice about putting New on C was before SSDs were the primary drive.
That is best practice now is to simply but video on the HDD rated for surveillance cameras and leave Windows, BI and DB on the SSD.
SSDs are not really designed for the continuous writing of video so when it dies, you lose your operating system and BI. I'd rather just lose the video drive that has nothing else on it. Sure people have used enterprise ones and can get many years out of it, but if you use cheap consumer grade, you will kill the SSD in a year or less like this person has twice:
SSD HD Failure 2nd time