I was trying to use ftp.drivehq.com for my Amcrest Webcam. It initially seemed to work as it created a folder, but then I am unable to FTP now. Was it blocked? I am just a home user. 

DriveHQ's FTP/SFTP server is designed for businesses, it is not included in the free/personal service plans.

For IP cameras / DVRs and NVRs, we have a dedicated service at www.cameraftp.com. CameraFTP is a DriveHQ division, but it is offered as a separate service. 

For information about how to configure AmCrest IP cameras, please watch this video on Youtube:

https://youtu.be/ZElkCy9_lyM

or visit the Setup Guide page at:

https://www.cameraftp.com/CameraFTP/Support/Amcrest_FTP_CloudRecording.aspx