Where can I buy a TV set for my Smart TV?

You can check online a lot of options that are helping to watch any movie in high quality. I prefer to use apple set box.

Try to check different online stores like Amazon or Ebay.

I was ordering https://www.infomir.us/products/mag420.html which is a perfect solution in this situation. This set is a perfect solution if you want to watch video in high quality and enjoy last movies. This set is a perfect solution if you are having Smart TV, it is easy in use. The only thing you need is a good internet connection.

I don't have TV. I watch movies and listen to music on my laptop on YouTube. It is convenient and inexpensive. Sometimes I save music to listen to it again.
The youtube downloader does a great job with this. This App can download up to 99 files at once, allowing me to convert whole playlists to the format for me need

Explore the capabilities of your smart T. You can install a special application and watch YouTube on your TV

Smart TV is great for watching even more videos. I have a smart TV too and I am using Elmedia Player to stream local video to Chromecast from Mac https://www.elmedia-video-player.com/cast-to-chromecast.html
Elmedia Player works with pretty much any file format. When you are using Elmedia to stream MKV to Chromecast from Mac it'll either cast your file as is (if the format is supported by device) or will convert the video on the fly into a supported format to offer you smooth uninterrupted playback.