In the video he shows a lunge move to climb in without the bars, but his forward momentum is blocked by the bars themselves. The experiment would have been better without them, but they're there now.
The fact is the climb is doable.
The fact is Rudy Guede was found holding stolen property from a break-in walking distance from his house that involved a climb up a 4 meter metal grate and balcony rail.
The fact is this strongly suggests to anyone with a functioning brain either Rudy did in fact break in to that cottage, or Amanda was smart/lucky enough to stage a break-in in a strikingly similar style to her supposed accomplice she couldn't speak the same language as, which helped raise reasonable doubt.
The fact is denying the above is an act of delusion.
The teams of forensic police and four separate judges do not support your What If...? scenario.
It was a transitory student accommodation with no reason to be of any great interest to professional thieves, other than electronic equipment, which, tellingly, was left untouched, as was Filomena's gold jewellery. If Rudy's MO was stealing laptops, then whoever simulated this one, did not copy Rudy well.
Bits of paper scattered about to give the appearance of ransacking were found ON TOP of the duvet covering Mez, one in Filomena's room, had Amanda's footprint on it, glass from the window was ON TOP of the strewn about clothes and most incriminating of all, a footprint encased in blood leading INTO Filomena's room, contained the MIXED DNA of Mez and Amanda (no DNA at all of Rudy in the burglary room). Amanda must have entered that room AFTER Mez' assault. In addition, a shard of glass from Filomena's window was found on Mez' floor. Therefore, Amanda was LYING when she claims she had no idea Filomena's room was in turmoil the next morning, claiming the door was shut, yet Raff said it was "wide open". WHY LIE ABOUT IT???
No doubt someone could climb up to the second floor window, should they be greatly motivated to, as was the professional pro -Knox climber. However, it doesn't logically follow, they did.