

You can earn Microsoft Rewards points by using Bing search egine in the US, redeem them for gift cards, for personal use or to sell/trade for cheap cash. I think in the US you can earn up to 15-20k points per month, a $10 gift card costs like 9k points.
I would archive all those 500 vhs tapes. Nostalgia. There are some private trackers encouraged people to upload it. Even a commercial ads from the 90s (of course you cannot just compare it with movies vs commercial ads) are being uploaded despite low quality. Or you could find some collectors.