I would want to save that too. (I have banjo lessons like that, but psoriatic arthritis makes them rather academic.) A few suggestions for you to consider:
- convert the video into the latest and highest quality format you can find. I would suggest Apple's HEIF it is new enough that it is likely to still be around in 10 years, it yields excellent quality results, and the files are amazingly compact.
- I would store it in more than one location as a hedge against disaster.
- No HD, SSD/NVME, CD, DVD, thumb drive, etc. is likely to last 10 years but by using a variety of different media you can spread the risk. If it were me I would probably put it on two or three of the best, highest quality thumb drive I could find, prefeerabely one with both USB A and C ports. something like this or this
- Putting at least one copy in an on-line storage account such as iCloud. (Wether you like it or not, it is safe, reliable, and tightly tied to all Apple devices and likely to stay that way.)
- play and restore the copies every couple of years and be prepared to change formats if it seems wise.
