It was thought to be impossible. This level marked the end of the game, unintended by the creator, for an entire decade, as no one ever thought it could be beaten. But then in May, everything came together, and this oncethought final level became possible to complete. This is the full story from start to finish of the infamous BFDIA 5b level known as "I'm Sorry".
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CHECK OUT THESE PEOPLE!
Meester Tweester:    / @meestertweester  
Coppersalts:    / @aboxofsnakemice1798  
Antladders:    / @antladders  
Trevarity:    / @trevarity8710  
Dunkel:    / @dunkyl  

MUSIC (in order)
Intro jingle created my me
Kevin Macleod Hyperfun
Kevin Macleod Investigations
Jingle at 1:47 created by me
Marvel83' In Between
Kevin Macleod Pixel Peeker Polka (sped up)
Carl Casey Miami Sky
Kevin Macleod Sneaky Snitch
Quixotic Dust to Dust

Chapters
0:00 What is BFDIA 5b and level 53?
1:09 5b's most gamebreaking trick
2:42 The woes of grabboosting
3:56 What's a wall?
4:50 A man with a plan
7:01 Back to the drawing board
7:52 It has been done
9:23 I lied to you...
10:20 Conclusion (for now!)
10:54 The reaction to the first completion

for license agreement with White Bat Audio:
Music: ‘Miami Sky’ by Karl Casey @ White Bat Audio”