Here’s another set of video explanations (one math, one verbal) of practice problems found in ETS’s Paper-based Practice Test for the Revised GRE, a PDF released by the test-makers themselves.
You can find the whole set of explanations for every practice problem here. Enjoy!
Math: Section 5, Question #5 on pages 72-73 that asks about 6 < x < 7 and y = 8:
Verbal: Section 3, Question #5 on page 51 that begins, “Stories are a haunted genre; hardly (i)_________…”