Here's a podcast-style discussion about archiving 480i and interlaced video issues. Ever wonder how some 480i games could be 60fps...even if 480i runs at 29.97? Or how come camcorder footage isn't actually 30p? And how do you even capture interlaced video!?!?!? Dan's expertise in the field really added a good perspective to these topics and I'd suggest giving this a listen, even if you're already familiar with how this stuff works. 

Dan's Website:  https://stickfreaks.com/
RetroRGB Contributions:  https://www.retrorgb.com/author/_daemons

Mediainfo:  https://mediaarea.net/en/MediaInfo/Download
Mediainfo's QC tools:  https://mediaarea.net/QCTools

Displaced Gamer's 240p video: https://youtu.be/zwDPx6hP_4Y