The video showcases Stone leaving a practice in visible pain, pain that was assumedly caused by his past back injury that was so severe, he had to receive surgery and unfortunately skip a large chunk of the season. Despite this horrible injury, Stone managed to conjure up the strength to return to the ice, and help his team secure a win for his team in the playoffs.
Despite this impressive feat by Stone, hockey is a competitive sport, and winning is the main priority, there is no sympathy on the ice, and Stone's injury, while tragic, makes him a big target during games.
A video has recently come to light on twitter. The video displays yesterdays game, in which the Oilers lost 6-4. Throughout the match, it's very obvious that the Oilers are trying to capitalize on Stone's injury to gain an advantage. The video can be seen below:
This strategy highlights the reason teams are often hesitant to disclose injury information during the playoffs, as opponents may exploit such vulnerabilities. It is likely that the Oilers will continue to focus on Stone throughout the remainder of the series.