Here is a list of period movies and series that I've found on Youtube. I've watched most but not all so I'm not necessarily recommending all of them. This is just my playlist on Youtube of ones that I've noticed that have been uploaded.
I've created a playlist of the first clip of each of the series for that drama.
I try to keep the list of films updated on my site Enchanted Serenity - my original list of 80 films has ballooned to 180! Wow, I can't believe that many are available on Youtube and I'm trying hard to watch them before they get removed!
If you don't mind watching a film in 10 minute clips, feel free to check out the list!