What's the easiest way to break bedrock in 1.16.5?

What's the easiest method to break the bedrock in 1.16.5? And which are the materials needed?

Also, can I easily tunnel down through multiple in survival mode?

As far as I know, in 1.16.5 there was a glitch involving pistons.

Here's a video tutorial of that method, which is a bit complicate to explain by text:

Materials needed:

• 1x block
• 1x lever
• 2x regular pistons
• 1x trap door
• 1x obsidian
• 2x TNT

This method is 100% reliable requiring no luck, and you can punch a hole in nether ceiling in under 30 seconds. With this technique you can break any unbreakable block, not just bedrock.