I heard a biologist talk about why this extra size on a liger would be a distinct disadvantage in the wild. Tigers are already big enough to take down all but the biggest herbivores in their environment. Tigers can't kill mature rhinos or elephants and generally won't attack mature bull gaur. Although a tiger is capable of killing a mature bull gaur, the converse is also true. The extra size of the liger wouldn't help against rhinos or elephants, so it would have little advantage.
However, the extra size comes with one major cost. The extra size calls for lots of extra calories. Another cost is that the extra size makes a liger more clumsy than a lion or tiger and therefore a less effective stealth hunter.
“I’d guess this animal already has some health issues do to the un-natural size and will develop more - neither the lion’s frame nor the tiger’s normally carry that much mass.”
From the video he looks pretty fat. But hey, who’s going to put a cat THAT size on a diet?