brah, if its conrod. Its bad. Its nothing of DIY stuff.
conrod = connecting rod

this rod connects the the piston to the crankshaft. Hence the name conrod is given. You have to dismantle the piston and the cranckshaft to replace the bearings. So, its nothing like remove the oil pan, replace the bearing and reinstall the oil pan.
How many kilos the engine has travelled?

how can you tell its the sound from conrod bearing?
Honestly, I cant tell if its a must or no. Because, you cant see the actual condition of the moving parts down there unless it is opened and judged by professionals. I am no pro hence I cant tell you the exact solution.
cheers.

do that to check if it is really conrod bearing failure.