The videos I record on my phone are significantly bigger in size than videos of similar or higher quality that my friends seem to record. I've tried to change the settings but to no avail. I'm currently using a resolution of 640*480 and have set the quality to normal (there is also fine and super fine). It's still taking up about 15 MB per minute. I've asked some friends and their videos are between 4 and 5 MB per minute and they're using similar or better settings.
What can I do to fix this and reduce the file size?
I have a Huawei Ascend Y300 running Android 4.1.