Bests & Worsts Reviews from Amazon

I did just downloaded this and hope it's not too soon to give 5 Stars. I missed seeing "The Dust Bowl by Ken Burns", the other night, so was really excited to see this app on Kindle. A couple of the low ratings for this may be an issue of feeling out a new app on their Kindle. The 3 low ratings were people that couldn't seem to open any video's after downloading the app. I purchased the app on my Kindle, opened it, then noticed on the top of the screen something to select or click to select your station. (Maybe they had not done this step yet?) When I clicked on it, I had to enter my zip code, then a list came up of my local PBS stations. I was then able to open a video with no problem. A 3-Star review mentioned that the video wouldn't rotate in landscape mode and wouldn't open in full screen: I noticed when the video first opened, it gave the option of opening in full screen, but it didn't stay on the screen long enough for me to select. It took me a couple of tries to get it to open in full screen mode, finally getting a bar to open on the bottom of the video with a couple of little arrows on it, clicked this and it's in full screen mode and the video does rotate when the Kindle is turned sideways.