How is NTSC analog video written to a Video8 tape, or analog tape in general for that matter?
This is just a short recall of what I remember.

The H sync tip, and chroma burst are stripped off and then restored with a standard sync tip after reading.   Since the sync tip corresponds to past the the edge of the tape with some guard edge, there is a precision servo to sync the spinning  head and tape speed to the standard rate  derived from the Hsync standard rate. The chroma burst is inserted with the sync tip during playback.

There are two sets of gapped heads on the heliscan drum with gaps to correspond to the horizontal blanking interval (BHI)

Since the chroma burst is harmonically related to the H sync as well as V sync and tape speed, there are several servo PLL's to regulate tape speed and heliscan drum recording/playback head to synchronize all the signals back to the standards Hsync frequency.

The video signal itself is also converted from AM carrier to baseband to FM to tape and the reverse back to RF out on CH 2 or 3 or composite video out which is compatible with monitors on 75 Ohms.





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