Not sure if anyone else has said this but at the very start of the vid its shows the lvl 13 archer towers but also it shows the "shop" button the right hand corner has the no: 3 on it indicating something new to build(maybe).
With 46m0s remaining on regen i took a screenshot, bar is a total of 128 pixels, 73 of those pixels are black so 55/128 remaining or still 43% remaining, 46 / 43 * 100 = total regen time of 107minutes but since calculation isn't that accurate and they would never use 1h47m for regen the mostlikely outcome is that the regen time will now be 1h45m for maxed heroes.
EDIT:
Thats what my far less scientific lying eyes thought too.
- Hero lv 40 Sleep timer 1:45
- 8 mins Valk time
- Lv 13 archer towers
- New dark troop (air) targets air tower then other defense
- Spells cancel no longer get 50% reduction on refund
- Healer improved AI