The first video features two bag battles. You'll notice that some of the cubs want to chew on the bags and others just want to tussle. Destiny, the lone female and the smallest of the batch, is one of the ones that just wants to tussle. The second video has wulfwalker feeding Timber, the most shy of the cubs. She reported that there was some progress when food-bribes were used.
Wolf-Dog Cub Bag Wars 09:19
Wulfwalker Feeds Timber 03:12