If your video is still beyond the maximum limit after verifying your account, compressing the video for uploading to YouTube is the best practice. We highly recommend you utilize WonderFox HD Video Converter Factory Pro to convert videos to perfectly meet YouTube video specs, including reducing video file size to cater to YouTube length limit, converting video formats to YouTube well-supported H.264 codec, changing video resolution, modifying the aspect ratio, etc. Meanwhile, it will help you apply post effects to make your YouTube video sparkle, add text annotations, watermarks, subtitles to videos, merge multiple videos into one for uploading, and more. Let’s learn how to upload large videos to YouTube by compression using HD Video Converter Factory Pro. Install the software for preparation.