Video files with longer lengths have larger file sizes compared to shorter videos in the same format. Uploading a large video to Facebook can take a long time, especially if you have a slow Internet connection or even a slow upload speed. If you don’t want to cut out parts of the video or alter the resolution of the video, you can still change the file format or compression level of the video. Changing the file format of a video to MP4 using a video conversion tool reduces the file size while still maintaining compatibility with the Facebook upload feature. Warnings Writer Bio
