Reddit mentions of Killer One Pocket: A Strategic Instructional Video for One Pocket Pool Players

Not too many 1pocket videos specifically for instruction, at least, not lately. Scott Frost's are pretty much the only modern ones, and they may not be the basics of 1pocket, they're advanced moves you can use in specific situations.

There are some older videos if you can find them, the classic ones are from Grady Matthews.

https://www.amazon.com/Finer-Points-Pocket-Grady-Mathews/dp/B00104CQ98
https://www.amazon.com/Killer-One-Pocket-Strategic-Instructional/dp/B0013EJ4SQ
https://www.amazon.com/Grady-One-Pocket-Mathews/dp/B0015GH2AE

Some of these I think are on Youtube, under a different title maybe. Despite the super cheesy quality, and the fact that Grady looks and sounds like a science teacher on the verge of retirement, the actual info is really good. This is a guy who won every event you could think of in one pocket, and used to play for thousands per rack.

https://www.youtube.com/watch?v=AJWBthmM4DI
https://www.youtube.com/watch?v=jY7NjmBPsoI

So much of 1-pocket is specific situations, it's like you just need to see a zillion match videos, to see how they handle the zillion situations that come up. The old accu-stats DVDs are good because back in the day, the commentary was usually a little more professional and focused on the match, and not so much rambling and amateur stuff you see in streams today. And the guys doing commentary could actually play... Grady Mathews, JJ, Billy Incardona, Danny DiLiberto, etc. With modern youtube match videos, anything with commentary by scott frost, jeremy jones, john schmidt.