After playing the original again, I can comment on what he did that was disingenuous.
1. He cherry picked the enemy A.I. footage to make the OG RE 4 appear better. One easy way to compare this situation: When in the castle, get to the room that has the cage fall above you and you're locked into it with the wolverine claw blind guy. Go through the lock behind you, exit, and circle around the cage. The enemies will try to chase you through cage walls and won't even consider the fact that they can leave the entrance behind them that you've just created in order to fight you. You can easily shoot them or mess around with them from there. There are more examples but this is a much more obvious one.
2. He mixed the audio improperly in multiple sections and cherry picked the OG's audio at times. If you play the remake with music off, there are ambient sounds where there should be. He turned off/turned down the music where there should be music in certain moments. Also the mixing for the original was only built for mono/stereo speakers on 4:3 TVs and had very little to no 3D audio, so it has been boosted since inception. To say this as nice as possible, 'boosted audio = good' is a very level 1 brain take when it comes to audio. Who knows, maybe Crowbcat also likes soundcloud artists who are terrible at mixing too as long as it's loud
Also, Crowbcat shows a few rooms of the castle to imply that the eerie humming noise is ambience, but it is not. That noise/music is when you are in an enemy encounter. He left one enemy alive, off screen, and let the music play to imply that the combat theme is ambience. When if you play the original, the rooms in the castle are extremely quiet once out of combat and all you can hear in 95% of them are Leon's footsteps. He even proves this(against his own video title) later on in some of the rooms, for example where you grab the goat head after fighting the knights.
3. The Krauser section is extremely disingenous and cherry picked. His footage makes a large implication that there is no actual knife fight gameplay in the remake and that the OG has quick time events. The remake fleshed out the entire fight into a full on knife fight with added QTE's and dialogue(that he conveniently skipped). He also conveniently skipped the second Krauser fight and the Mike/Helicopter guy fights which were both done better in the remake. Honestly, he skipped entire parts in the remake(including additions) to only showcase what he felt was worse.
This is why people are saying this is a bad video. The problem is that everyone who's pointing this out is being called a 'Resident Evil 4 Remake fanboy' or worse, but most of the people like myself just want a fair 1:1 comparison and not whatever lazy pointed edits these were. He is capable of better and he shows it in his past videos.
Even in this video for example: He is right about the cut content. You could argue it was for creative purposes, lore purposes, or maybe will be included in the DLC for Ada. However that's fair, what's cut is cut. The same goes for some of the little extra animations including death animations, gross leaking out of the more bug-like enemies, etc. That's fair to criticize because it was left out or edited differently. If this were a more honest video, it would be an amazing comparison piece. As it is now, it needs a ton of work and the tons of people looking from the outside in who've never played the Remake are getting a very, very biased comparison shown to them from a youtuber who's usually better at this.