On the EOS 7D, the standard firmware does not seamlessly split a clip and continue recording without interruption. The camera is limited by both the 4GB file size cap and an overall maximum recording time of about 30 minutes, whichever comes first. At the default bitrate, 4GB is reached in roughly 12 minutes.

With Magic Lantern, you may be able to extend recording time by lowering the bitrate, and its movie-restart option can start a new file after the limit is reached, but you will lose a few seconds between files. It is not truly gapless recording.

If you need continuous recording beyond these limits, the practical solution mentioned is using an external HDMI recorder. That avoids the internal file-size restriction, though the camera’s live-view timeout behavior may still need to be managed.

So: no, the 7D cannot natively record one uninterrupted long video by automatically spanning files without a gap.