A brutal assault of an older couple leaving the Elton John concert at Dodger Stadium this week was captured on camera -- as were the alleged assailants ... and TMZ has the video.

This incident has been going viral on social media the past couple days, and for good reason ... a man and a woman, both in their 60s, were senselessly attacked Thursday night by what we're told were a group of at least 4-6 people, this while trying to exit the parking lot.

Sources with direct knowledge tell TMZ ... the older couple, who'd gone to the concert by themselves, were getting ready to leave when a woman allegedly punched their sideview mirror, causing the husband to get out, confront her and and seek an explanation.

We're told the woman then tried to swing on the older man, who blocked her. At this point, our sources say the gentleman was mobbed by at least two men who started wailing on him ... part of which is on video. This footage is graphic, but you can see him being pummeled.

Sadly, it wasn't over yet ... we're told the wife hopped out to help her husband, only to allegedly be body slammed to the ground as well by some men in the group. She was knocked unconscious, and both of them were left there helplessly as people stood around.

Our sources say bystanders filmed it, but not much else to help these poor folks. As the group tried to walk away from the scene, one man followed them and recorded ... only to apparently be attacked himself when the guy in black noticed him and pounced.

Eventually, we're told the couple was helped back into their car and the wife came to. Our sources say they were waiting for EMS to show up ... but that it took far too long for any first-responders and/or stadium security to arrive. After some time, the wife felt okay enough to drive both of them to the hospital ... where we're told the husband was admitted.

At some point, somebody recorded what we're told was one of the women who was allegedly involved being questioned by what looks like a cop. Our sources say the officer didn't realize she was one of the people who was allegedly in the mix ... and was cut loose.

The children of this couple -- who were not present during the night in question -- are now desperately pleading with the public to come forward with any information to identify the 6 people they claim thrashed their parents, and have filed a police report to boot.

As you can imagine, they want justice for their family ... as their parents could've easily been killed, and as of now -- the alleged attackers have seemingly gotten away with it scot-free.

Our law enforcement sources tell us the LAPD is aware of the incident and are investigating. No arrests have been made. We've reached out to Dodger Stadium ... no word back yet.