sends this news from CNET:
Reports are emerging that Samsung smart TVs have begun inserting short advertisements directly into video streaming apps, with no influence from the third-party app providers. The news comes just days after Samsung made headlines for another incursion into users' lounge rooms, when it was revealed that its TV voice recognition software is capable of capturing personal information and transmitting it to third parties. ... The issue has been reported on the Plex streaming service — a brand of media player that allows users to stream their own video from a personal library or hard drive and push it to a smart TV.
Samsung says this was not intentional, and that they've fixed it so the ads should no longer show up.