The GB used will depend on how big the file size is, which is determined by the video resolution, the compression, and the audio quality. Here is a general estimate of the file sizes for different video resolutions:

Standard Definition (SD): An SD movie with a resolution of 480p typically has a file size ranging from 700 MB to 1.5 GB. So at this resolution you will be using fewer than 2 GB.

How many GB is a 1080p 2 hour movie?

High Definition (HD): An HD movie with a resolution of 720p or 1080p generally has a larger file size. It can range from 1.5 GB to 4 GB, depending on the level of compression and video quality.

Full High Definition (Full HD) and 4K Ultra HD: Movies with resolutions of 1080p (Full HD) or 2160p (4K Ultra HD) tend to have significantly larger file sizes. A 2-hour Full HD movie can range from 4 GB to 8 GB or more, while a 4K Ultra HD movie can occupy 10 GB or more of storage space and 10 GB of data usage on your plan.

Bear in mind that these estimates are approximate and can vary depending on the specific encoding, compression, and quality settings used for the movie file. Additionally, streaming services often use different compression techniques to optimize streaming, resulting in smaller file sizes compared to downloaded movies. Viasat has a partnership with Disney+ that helps save data on the above but does not currently partner with other platforms. The sure way to measure how many GB you will use while watching a 2-hour movie is to test it. This means streaming a movie at SD, HD, or Full HD, and noting in your My Viasat app how much data was used post-event. That should give you a more accurate idea; try to limit or avoid other online activity in your home while you are watching to give you the most accurate measurement of the data usage for the movie.