@newbiefan
Most of the Vietnamese dramas that I've found to watch are on Youtube, but I'm a BoysLove Drama fan, so it's a bit easier to find FanSubs of things. If you're familiar with Vietnamese television stations (Wikipedia has a list of them), you can often find a presence for them on Youtube and they will have a few dramas online for people to watch. It's a total crapshoot whether they will have English Subtitles or not. Like, this little gameshow I clicked on at VIE Channel - HTV2 on Youtube has subs:
https://www.youtube.com/watch?v=X7oSydUcnCY
But the first drama I tried under their playlist section did not:
https://www.youtube.com/watch?v=vG5knDFrFU8&list=PLxKLMN7WdG5DIa8T9nt0h9iPnpV-_yO7S
Viki.com does have a handful of movies. "Goodbye Mother" is worth the time if you're subscribed. It's a BL, but a very accessible one.