Help with choosing record sizes

I am upgrading to a new bigger NAS running TrueNAS Scale with 30, 24GB HDDs, running in a dRAID2 set up in a 3vdev configuration. In that pool are 6, 1.75TB SSDs, that are set up as special metadata.

I have been trying to figure out what to set my record size and special block size to. Below are the block sizes of the QNAP NAS we are currently using. It has a total of 88TB of video, project files, audio files, etc. These files will be migrated to the TrueNAS NAS for video editing.

ChatGPT is telling me to make the record size 4M and the special block size 1M. I need to know if this is correct and if not what is recommended? I highlighted the largest block sizes for simplicity.

Thanks!

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