Hi

. . . . Can I edit videos with two different frame rates from two different cameras in one timeline? . . .

You can, however depending on the difference in the frame rates and the project settings, you may experience some jerkiness in exported videos that are not the same frame rate as the project and your export settings due to what is known as 'pull down'.

The pull down issue is most noticeable when there is fast movement across the screen or a pan shot.

There is a further potential issue if one cameras video is progressive and the other interleaved video.

If the export is a progressive format then you may see de-interlacing artefacts known as 'combing', again this is most noticeable when there is fast movement across the screen or a pan shot.

HTH

John EB