Original Streaming Platforms:

CH3+ (Subbed) 

Netflix (Subbed. Needs VPN for some countries, Preferably Thai and Singapore VPN) 

Pirated/Free:

HiTv

Kdrama Sites:

Dramacool/Viewasian.cc/Kissasian

Ch3+ has subs. I watched it there this evening. A month's subscription is US$3.

Word from reddit (see Comments section) is that episodes will be available on YT three days after they air. No need to risk the sites monetised by malware-laden ads.