I am going to finish such a project soon myself, including some old Video8 tapes! Sounds like you're on macOS, Any reason you didn't use iMovie for the capture itself?
The Video8 tapes have already been digitalized via a Digital8 camcorder, but apparently you can get even better quality out of old analog tapes with the vhsdecode project. Let's see if I ever get around to that, but at least it bypass Firewire entirely:
https://github.com/oyvindln/vhs-decodehttps://www.reddit.com/r/vhsdecode/
The Video8 tapes have already been digitalized via a Digital8 camcorder, but apparently you can get even better quality out of old analog tapes with the vhsdecode project. Let's see if I ever get around to that, but at least it bypass Firewire entirely: https://github.com/oyvindln/vhs-decode https://www.reddit.com/r/vhsdecode/