Are you trying to upload a YouTube video and getting an error like this? Server has returned an invalid response. The server has rejected the file.
This is likely from you trying to upload an HD video more than 15 minutes. It will give you this error, but for some reason YouTube won't tell you it's because it's too long. They just give that generic error that leaves us scratching our heads.
You will find many people saying they solved it by silly means, which don't work. You might read advice to try Google in incognito mode, or try IE, or use the old upload interface, or connect the ethernet cable directly instead of going through a router, or even download special software (which you don't need). If you're getting the 'Server has returned an invalid response' error, it's likely it's none of those. Instead you simply need to register with YouTube to upload longer videos.
How To Increase YouTube Video Upload Limit Beyond 15 Minutes
To upload HD videos longer than 15 minutes and avoid the error, do this, go to this link and apply: https://www.youtube.com/my_videos_upload_verify
If you're approved, you should instantly be able to upload videos without seeing that stupid error. Hope that helps you! If so, please leave a comment below.