Have you tried Tubi TV [http://tubitv.com]?
They have ‘free’ movies and TV series, but they also have commercials. Their commercial breaks are very short — 1 to 3 topics, each about 5-10 seconds, and the breaks seem to be about 20 minutes apart.
My previous experience with those ‘commercial embeds’ was their frequent lock-ups. I have not had that with Tubi TV.
They do have a sizable catalog and a few AU, UK series.
Thanks. I’ll look, but streaming video is near impossible for us. :)