In California timestamping can only be used at certain times (there was a problem with it being used to pad all transcripts.) One of those times is for videotaped depos, which makes sense for syncing, etc.
I have had attorneys specifically ask me to use the timestamping with video, but I'm wondering if people always timestamp videotaped depos or only timestamp when requested or ask at the time of each videotaped depo.