Most VCRs were preset to output to UHF channel 36 (at least that's the UK numbering, it may be slightly different in the US), and so while recording different c

Most VCRs were preset to output to UHF channel 36 (at least that's the UK numbering, it may be slightly different in the US), and so while recording different channels would be fine with multiple VCRs without a TV, watching the output from multiple VCRs wouldn't have been as easy. Maybe she wanted to be easily able to check what a particular VCR was recording without having to swap wires at the back of the TV. You could probably have made a giant coax switch box too, but it's unlikely they'd have been available commercially with more than just an A/B switch. There also used to be tuning screw accessible via a very small hole on most models in the UK, and you could re-tune it to output on a different channel that way, but sometimes you had to open up the VCR to get to that. Or maybe she just didn't know that was even possible. In any case, there would only have been so many spare channels for her to use before she started interfering with the broadcasts she was trying to capture. Maybe she just liked having a bank of screens that all had a different channel. I know my younger self would have thought that was pretty cool!