That is completely unecessary and really a bad idea with an animal that young and small that oftens get startled by something as simple as a snake tong. You are actually lucky that she ate at all.And I would always grab her gently and place her head near the Pinky and she would eat immediately
Offer food with tongs or leave it on the tub's floor (overnight) without messing with the snake and giving it privacy. (No staring, no video)
If that does not work downsize to a 2.7 quart tub like this one
http://www.walmart.com/ip/Sterilite-...-of-6/55413807
Once move wait 5 to 7 days and offer food, at that point if that does not work start scenting with the following
Hard boiled egg
Vienna sausage
Anchovies
Toad
And if all that does not work use reptilink and frog juice https://reptilinks.com/products/frog...and-mini-links