To be honest, I stopped doing the 2x training sessions if I intend to apply rests to players. I use the vids more for resources like morale and rest packs and to increase my players' staminas in the training menu. I come to find that I gain enough bonus to get all my stats to 8% daily, which I'm fine with. I stopped taking it to 10% as I found it's better to have a fully rested team with good morale with 8% bonuses rather than a 75% rested team with 10% bonus. That's just me though.