Depends on the video! I’ve used every kind of pick at one point or another and if you really want to go crazy this section of the Primer has pretty much everything you ever wanted to know about picks:
Lately I just use the regular red nylon Jazz III.
When in doubt, the three “default” pick styles are the Jazz III, the Fender 351 (medium or heavy), and the “346” which is the big equilateral triangle one that bluegrass players use. If you have one of each of these, you’ve covered most bases.