First - are you going to be watching on a big screen (like a 60" TV), or on the phone. Most people (statistics say 98%-99%) can't tell the difference between 1080 and QHD - QHD is only twice as many pixels (hence, about twice the storage space - it varies according to the picture) as 1080, so taking up twice the amount of storage for something you can't see makes no sense.
If you can see moth Mizar and Alcor as separate stars (the ext to the last "star" in the handle of the Big Dipper) and then resolve Mizar as a double star, you'll easily tell the difference between 1080 and QHD on a 5: screen. (But you'll be able to read a newspaper from about 10 feet or more). So normally, for video that you';re going to see on the phone, 1080 is fine. (even 720 isn't that bad.) But if you're going to watch it on a 4K (or 8k) large screen TV, the higher the resolution of the video the better. (If you're going to watch it on a TV that tops out at 1080, it's going to show a QHD video as 1080 anyway, so it makes no sense to record it in QHD.)