I have an A8 as well and if you click on the video when it is playing, then click on the little square at the bottom right of the video, the video will go in landscape mode, in other words, full screen.
I have an A8 as well and if you click on the video when it is playing, then click on the little square at the bottom right of the video, the video will go in landscape mode, in other words, full screen.