This video?
First, an instructor just needs to pay his/her dues to maintain status. There is no recertification required for instructors. While I and many other instructors would support it, I doubt it would fly, given the peanuts that many instructors have to live off of when teaching in backpacker tropical destinations. And a lot of certifications come out of those places.
I don't think a CV will guarantee good instruction. You need to understand what is involved in open water courses. A CV won't capture the self-education they have done to become a better instructor. You need to interview your instructor, have a good understanding of what your needs are (are you a fish and have no issues or do you have any phobias? Or somewhere in between). What is their teaching style? Does his or her personality mesh with yours? You want to get a good course, but you don't want to think your instructor is an ass.
Here is a blurb (a cut and paste) of what I tell people interested in taking an open water course. I hope this helps.
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If a student wishes to maximize her or his benefit from early training (open water and advanced open water certification), it is important that the student interviews prospective instructors to find a good match in terms of personality and teaching methods.
In order to facilitate this process for the teaching methods, there are a couple of books and websites that I highly recommend (I also recommend them to instructors who pursue excellence as an instructor).
The books I recommend are by James (Jim) Lapenta for open water and advanced open water courses.
https://www.amazon.com/SCUBA-Practical-Guide-New-Diver-ebook/dp/B00I9K2KW4/
https://www.amazon.com/SCUBA-Practical-Advanced-Training-Adavanced-ebook/dp/B01N3UDHLT/
The online resources I recommend are by Harry Averill (a.k.a. Cave Diver Harry) and Andy Davis. Both are generous with publishing top notch training. Their respective websites/blogs are found here:
http://cavediverharry.com/
http://scubatechphilippines.com/scuba_blog/
For those who seek true excellence in diving in the skills they develop, I recommend that students look for instructors with strong tech backgrounds and/or ones that have gone through GUE Fundamentals, UTD Essentials, or ISE Basics of Exploration or are certified for cave diving. The reason that I recommend instructors with such a background is they have pursued excellence in their own diving, as these are some of the most difficult courses a diver can take. Students who take these courses find that they have the result of dramatically improved diving skills. And that translates to helping the new diver have the appropriate foundation of skills from which he or she can grow rapidly.
While people like Andy Davis, Jim Lapenta, and Harry Averill are not accessible to everyone, there are a number of other instructors who look at how to teach at the highest possible level. Look for them. Students may recommend other instructors, but honestly, while they have good intentions, they honestly don't know what makes a good instructor. It wasn't until I became an instructor that I realized how many standards violations occurred during many of my courses. Through my own pursuit of excellence as an instructor, I learned about better methods for teachings as I started with a number of shortcomings myself, and I'm still growing. Unfortunately I've learned that many instructors are mediocre. Fortunately, there are so many instructors who are excellent but it requires some work by the student to find them.
Finally, I'd recommend checking out this basic skills video:
(not sure why it doesn't play at the beginning. Tried to force it but it doesn't work).
All skills should be performed while trim and midwater. This allows students to improve their buoyancy skills while waiting their turn to perfect the skills underwater, thus making much better use of confined and open water training.
