Yes, it is supported. Dive also has a built-in recording feature, so you can capture and upload it as-is.
You can also include system audio and microphone.
When you stop recording, [Recording preview] opens. Drag the handles at both ends of [Range to use] to remove the unneeded parts from the start and end of the recording. Set the range, then click [Continue with this range], and only that range is taken in as materials. AI analysis is also performed on the video in that range. If you leave the range unchanged and click [Continue], the overall recording is taken in.
If the range cannot be trimmed, the overall recording is taken in. The longest a single screen recording can run is 1 hour.
Note: You can also upload video materials you captured separately as-is and use them.