What I'm saying in the video is that - should you want to buy more BTC now ( as we're still in the accumulation phase ) , it might be a good idea to invest some funds into ETH , and when the ratio climbs , you swop for BTC , this way you get more BTC than if you invested directly into BTC.
If you can handle it out and do accept the risk then go ahead yet this one would really give out opportunity to accumulate even more BTC and same as yours i wont
consider on selling btc to buy ETH.You can accumulate btc without the need on doing such thing.