Thanks for the updated information, luciane209.
Earlier you mentioned that you weren't entirely sure what the difference is between GB and TB in terms of storage, and in a way that might be where the disconnect is coming from.
When we talk about storage it helps to have some examples so you can make rough comparisons to ballpark file sizes.
Nowadays you don't see as much with the smaller sizes below megabytes or MB, but you can think of a byte being the same as typing a single letter of the alphabet, a kilobyte could be a text document as it is 1024 times larger than a byte. A megabyte is 1024 killobytes and you can think of songs in the range of 3-5 MB on average and an app you download to your device starting in the 200-300MB range.
When we start talking about media, such as photos and videos sizes get larger. A high resolution photo could easily be hundreds or thousands of MB. A video can range from a few GB (which is 1024 megabytes) all the way up to a few TB (1024 gigabytes).
Since we're seeing this with a longer video, about 45 min in length, it is possible depending on the settings the video was filmed at that this could be much larger than you expect.
Try this:
- Tap the Photos app and scroll to the video.
- Tap the video, it may begin playing.
- On the bottom you should see an "I" with a circle around it. Tap it.
- Some additional information will pop up, including the actual file size.
Let's find out what we are working with, and then we can figure out some ways to deal with the file in a way that makes sense. If it is too large for iCloud, you can always transfer it to a computer instead using this guide: Transfer photos and videos from your iPhone, iPad, or iPod touch to your Mac or PC.
Let us know how it goes.
Hope this helps.