I am new at this video recording....but you raise more questions from meBigger is not always better, especially in this case. If you have an itchy index finger, and like to record every second of your flight, what are you going to do with all that footage? If you're recording in 4k, and you intend to edit it later, you need to become more efficient with what you choose to record.
I have found that most people who want cards any bigger than 32gb, are people who dont use discretion when they shoot, and never offload their material. If they did, they would probably use a 32 lol
All of the best videos that people post up here are not 20 minutes long. They are composed, edited clips and usually not longer than 3 minutes. So if you have loaded up your $60 256gb Sandisk Extreme SD card with all your hours of footage, you are going to have to sort through all of that to create one 3 minute clip. Better bring some coffee.
...my family members tells me to keep my videos to 3 minutes because any longer people will not want to look at the video.
What do think? Or does it depends on the subject matter that you are trying to present in your recording.