My reply was delayed as I didn't have time to check out the video until now.
Jeff recommending Bitfinex, or BFX in trader shorthand is a massive mistake.
I understand why he selected it, based on their own reported volume and what they support on their platform. The looming crisis, however, is that they have struggled with gaining any new banking connections.
In the absence of legacy banking support, they've been using Tether, another centralized coin, to finance and run their operations. The issuance of tether has been ballooning under their stewardship, so what is happening is inflation on "steroids".
By diluting Tether and redeeming them for fractional units of Bitcoin or other coins, they avoid banking difficulties, but at the same time fall prey to the temptation of inflating their Tether supply to service more accounts.
As this increases, the dilution of Tether will mirror that of other failed experiments, like the Zimbabwe Dollar and the Venezuelan Bolivar, which is extending its losses in a hyperinflationary spiral.
The final analysis is, BFX will become unable to function properly which will no doubt be blamed on a "hack" or they'll just go radio silent and abscond with the funds, Mt. Gox style.
That's my prediction, and its a shame that Jeff suggested new people use BFX, because they are undertaking a huge risk without even knowing it.