Y'all realize people can be ticklish in more than one spot right? It shouldn't really have to be said, but I see a lot of these celebrity posts where something happens such as a celebrity getting a pedicure for example, or some sides tickling or something, and because they don't respond in a ticklish way, people are like "welp, looks like they're not ticklish!" Its not just this post. Its a lot of posts. Cameo or Twitter too. People will go on Cameo or Twitter and message celebs asking them (and I'm strongly against this) "are your feet ticklish?" and they'll say no. Then they'll come running back her to report that (insert celebrity here) isn't ticklish. Again, more tickle spots than just the feet. SMH.
She has feet, she could be ticklish on her neck, behind her knees, under her arms... I mean there's a number of tickle spots we haven't seen her tickled in. Not to mention as Erik mentions above, a good masseuse massages you without tickling. Outside of this forum, the majority of people don't want to get a massage and be tickled during it. Myself included.
To conclude she's not ticklish from this video alone would be foolish.