Hello, I am trying to manage my personal library in Apple Photos In all: 249gb consisting of about 35,000 photos/videos About 25% are old 4x6 paper photos that I scanned in manually at 600dpi.... and VHS+8mm videos that I manually imported with a capture card. Another 25% is all my digital camera photos from about 1999-2008 or so... some correct timestamps and some not (camera time wasn't set correctly, ugh). Plus photos that I've saved from my friends Facebook pages (which only gives you the timestamp of when you save the photo, not the original). And the other 50% is all 2008+ photos from iPhones with timestamps, geolocations, and (in the last few years) live photos. What I want, is 1 clean library with all the dates and geolocations to be correct as possible (lots of guesses with the old stuff). I've been doing it in small batches... basically 1 'event' at a time.... I set the dates & timestamps..... then export as maximum quality into a new folder. I finally finished... wiped out all the old stuff.... and started a new Apple Photos library with all the new/exported folders only...... Photos are all OK, but every video's timestamp is the Dec2018/Jan2019 export time, with no geolocation....... WHY??????????????????? They were all exported with the photos in the exact same way (all max quality, with metadata). Extremely frustrating that the metadata stuff isn't easier, across ALL platforms, really... should be such a basic thing.... the 'adjust' tools work OK, but why no option for just "set all to exactly this date and time"..... when I have an album with dates all over the place, I have to change them one by one.