Having taught several of my kids to read, I can honestly say that for us, videos or even records, were a waste of time and money. My mil gave us a tape she thought would thrill my socks off-it was Fran.. from Kukla, Fran, and Ollie..teaching basic phonics using her sock puppets. Must have been a special release from tv archives..but it was so stupid! We made more money than I want to admit when our oldest girls were in 1st grade for a super-duper phonics program on records, with extra games and junk to scatter around the house. The basic set had merit, but the manual was useless and so our benefit was limited, but we ALL learned that "A says aye or Ah, B says Buh.."
There are many reading programs available for under $50 or 60 that are much more useful and teacher friendly. I've been using Reading Made Easy by Valerie Bendt and it was about 40. It has a script for the teacher, and the reading material right with the lesson. The kids have copy work, and then the teacher reads them a library book. Simple, but effective. I've also used Teach Your Child to Read in 100 Easy Lessons..its in the $20-25 range by now, but my first copy was $16.
All this is to say, I highly doubt the "plug in a tape and leave" method of reading instruction works very well. A better solution is to sit next to the child so you know if they're paying attention, and focus on a book or materials in front of the two of you. Young children's attention span isn't very long, so the lessons don't need to be long-they'd better not be if you want the child to learn to love reading!
And as for teaching a kid to count-why would a video be needed for such an everyday task? That's what legos, blocks, m&m's and cookies are for. oh, and don't forget all those cars passing on the road..count trucks or blue cars or..Use the money that would have gone for the video and buy candy to count...