Undocumented footage coming from the Ukrainian front, allegedly shows a Russian tank exploding after being struck by Ukrainian artillery.

After analyzing the footage a bit, it would appear the catastrophic explosion happens after the vehicle already sustained significant damage. As the footage begins, you'll notice the vehicle seems to have already been hit and is engulfed in smoke. As the limited information has indicated, Ukrainian artillery struck this tank, but in my opinion, the larger explosion seems to have been caused by a secondary explosion (fuel, munitions, etc).

Unfortunately, there is no footage showing the leading moments to this explosion at this time, but it would be interesting to see what really happened.