qhobbes did answer you, but in case you didn't follow
I made a 47 minute video, and it came out to 106gb. The video was in 2560x1440 and had 60fps. Is this normal?
A file that large may or may not be normal, depending on your encoding settings. If you changed defaults and went for high quality, high bitrate, different color format, or any number of other options, then yes, a large recorded video file could be normal/expected.
Is there anyway to shrink the file without having to re-record?
The simple answer is Yes, as noted earlier, there are many free (and not free) options to re-encode the video file into a smaller file size. However, beware.. Such re-encoding, to make the file smaller, will entail either a loss of resolution/fidelity (though possibly not all that noticeable) and/or time/computer power.
Some encoding formats are results in smaller files for a given quality level, but take more compute power to create (ex H.265 vs H.264). In part it depends on what you plan to do with the file. Most Content Delivery Networks (YouTube, Facebook, etc) re-encode almost all videos anyway (and think something akin to generational video quality loss like back in the days of VHS copy of a copy.. though not as bad). So, if you plan to edit the video, then making smaller probably doesn't make that much difference (depending on s/w and computer). When you finish your edits, you can pick the format, color depeth, etc on the file when you save/export/render the final video. If you plan to upload as is, let the provider re-encode (assuming you aren't on a real slow upload link).
