Rocks/Pebbles in my engine? Options

[dabazied]

Hey peoples...... Pretty much my question is what do you guys think this could be? It sounds like rocks/pebbles are clanking around in my engine. When I rev the engine it gets louder and as the rpms go down it slows/quiets(the rock like noise). Would this be a fuel filter issue? The celi has been sitting for a while now and the gas is kinda old but i'm gonna drain that out soon before actually driving it. Let me know what you guys and ladies think. Thanks ahead of time

[dabazied]

Thanks to all the replies..... Apparently, it isnt constant and doesnt happen all the time either(tried it a couple times today with a camcorder and it wouldnt make the noise for me).... I highly doubt its and exhaust leak...... When I changed the oil it was the same color as normal oil would be when it needs a change(no sparkles lol)...... Im going to look into the rod bearing stuff and try to see whats up with that, i actually had a car that sounded exactly like that vid a long time ago with a rod bearing that bad before and just got rid of the car cuz it was a p.o.s.......... Well just in case, while im looking to see if its a rod bearing, Im gonna look into my swapping options b/c I am not ready to pay to put in another eco 4 banger with little power lol....... Vrrooom vvvrooooooom here I might be coming lol. I'll update the post with my findings with whatever I find, and til I figure it out, if anyone else has any possibilities they think of, please post lol. Alright, ttyl