It was not an easy journey. I have to admit. So want to share my User Experience (UX) with you all.
Because it involved 2 different branded Smart TV from different manufacture date, hence, pre-loaded apps were different. Apps? Yes. You will need those app to view movies etc. bought through Google Movies & TV.
A. On your tablet or android Google Play, top left menu - Movies section, search for movies you want to rent or buy. You can pay by using credit card or use your redeemed $$ from gift cards. I bought $25 gift card and rent a movie.
DO REMEMBER which Google Account you use to rent for the movie.
For renting, you will need to watch your rented movie within 30 days from the date you confirmed to rent it. And you will be required to "activate" the rental by saying Yes to watch now. Once you activate, you have 48 hours to watch it, unlimited times.
B. Once you purchase and activate, you can watch the movie via:
1. Your android smartphone or tablet - After you rent the movies, you can find it on your Library. Good thing is you can download the movie on your device and watch offline. HOWEVER, if you do that, you will not be able to watch it on other device. Remember this. Otherwise, you will be very frustrated (like me) when trying to watch the movie on any other devices.
2. Chrome (browser) - Which you will need to install Extension - Google Play Movies & TV. Double check your Chrome Setting and ensure under "People" section, it is using your Google Account that used to rent the movie. If not, remove the once stored in your Chrome and sign in with the Google Account with the rented movies you want to watch.
3. Your smart TV - If your TV does not have Google Play Movies & TV, you can try YouTube. I tried both on different smart TV. Sign in using the Google Account with the rented movies. Latest smart TV version may have Google Play Movies & TV. Under it, you can go to My Library to find what movies you can watch, either resume or start from beginning. While on YouTube, I did not find it under Library but History ... so you may want to do something to make the movies to be found under History, e.g. watch it briefly on your smartphone.
Have not try on iPhone yet... Share with us if it works on the iOS app. :-)
It took me quite some time to complete the UX "testing". As I cannot find any details online, hence, I just want to share quickly here with you all.