An amazing write-up by a passionate preservationist, Chris Person (@Papapishu on Twitter), on why YOU are the only one that can save media you love. 💿 📀 📽️ 📹 :hd_dvd_spin: :blobfoxcomputer:
A Timebase Corrector (TBC) fixes video sync on every scan line of an analog video. Even for good tapes it gives far better video captures.
Most VHS VCRs didn't have a TBC, that's one of the reasons each generation of copy was far worst that the previous one. Broadcast VCRs and S-VHS VCRs usually came with a TBC.