You don’t need accurate time for your photometry, so I hope you can fettle together some circuitry to embed user text into the video stream.
A look at mine and Tim Haymes’ Members’ Pages shows some of the results from video astronomy. Tim wrote a tutorial on Observing asteroidal occultations with digital cameras, which includes many useful links. My notes on video recording lunar occultations should be on the BAA webpages somewhere; here’s an external link to Guide to video astrometry (it’s in need of revision, but most of it is still valid).
Tutorials and webinars are most useful, but when you’ve got a permanent backlog of observations to analyse and report, it’s finding the time…!