Looks like that’s what was used in the video, and if it works it works 
but 1) JFET parameters like Vgs and Idss vary widely (see here) and 2) they’re no longer made in TO-92 (*) and there are known fakes out there (they’re popular with stompbox folks so there’s a market), so if you bought them in the last 5-10 years you (or the synth DIY guy) may have ended up using something else…
*) The SOT-23 version MMBF5457 is still made.