Does it mean that you're going to inspect the issue directly in All Video Share component ?
It means I'll look into it.
Then the file path would be components / com_allvideoshare / tmpl / views / video / tmpl / default_comments.php
I have commented the following lines,
//echo JComments::showComments($video->id, 'com_allvideoshare', $video->title);
You are effectively disabling All Video Share plugin for JComments. Of course it will not crash then.
OK, I downloaded the current version of AVS - v.1.2.3 - and the JComments plugin for it from here
Installed, set up a test video from YouTube. Everything works like a charm.
See the sceenshot.
Now, the All Video Share plugin for JComments is not from Smart. it's "third party", namely by MrVinoth, which I guess is you.
I have no reason to believe that there is anything wrong with this plugin. It works just fine for me, as I already said.
Since there seems to be some cases of successful usage and some cases of failure, I would guess the problem is not with JComments per se. Or with All Video Share plugin, for that matter. The problem is most likely with Joomla or Apache in each particular case.
I think you should troubleshoot the site - both the Joomla installation and the server. I'd help you but you know way more about PHP and Joomla than I do.