[dmdsoftware]

Are you using google drive spreadsheet functionality to store watch/resume status?

Yes, you hit the mark.
As soon as i set the resume point and playback count to "local only" playback starts working.
If i set it back to "Google Drive Spreadsheet" it stops.

That's what i meant when i wrote about Spreadsheet Issue with Teamdrives.

Thx, I will look into that issue.