Ever since I updated my 10.5 to Lollipop Netflix the video freezes but the audio continues (I even tried wiping the tablet to no avail).
This seems to happen most often if you pause Netflix and do something else, and then go back to Netflix to continue watching.
If you look at the comments in the play store you see lots of comments about this. Also people with the Note 4 seem to be complaining.
If you have this I did find a workaround, use an older copy of the Netflix app (I found the red icon versions work). I have version 3.2.0 build 1340 and it doesn't exhibit this behaviour.
Just a heads up.