There's no maximum length for recording with Easy Screen Capture Video.
However there are limits regarding file sizes.
The largest filesize you can have an AVI is 4GB on a FAT32 formatted hard disk and 16 EB (Exobytes) on an NTFS formatted drive.
Here are some tips:
* Only record as much screen area as you need.
* Keep you on-screen movement to a minimum.
* Try testing with a smaller quality setting in the video options area and try other codecs such as DivX if you're recording video playing in a Media player.
All of those should help reduce the final file size of your video.
Also, keep in mind that the larger the file, the larger the amount of RAM needed to play the video and the faster the CPU needed to display all the video data.