1) The most infamous one that most people have heard about, the marrying of a 6 year old girl, Aisha and how the marriage was consummated when Aisha was 9 years of age. This is one of the most dubious claims that have pervaded Islam and specifically Muhammad. The age of Aisha mentioned in aforementioned hadith is inconsistent with known historical facts and the historical nature of the hadith itself is sketchy at best, here's some evidence;
Ibn Ishaq, Muhammad’s earliest known biographer, mentioned nothing about Aisha’s age at marriage, the detail was added later by historian Ibn Hisham, the crippling problem was it was added between the years 754 and 765 CE, nearly 200 years after Muhammad's lifetime and he dropped the tale in Iraq, almost 1,000 miles away from the city of Medina (where the marriage would have taken place).
This support the case that the myth of Prophet's marriage with an underage Aisha was most likely invented in eighth-century Iraq and only later in the future projected onto the life story of Muhammad. Iraq at that time was extremely prone to factionalism and were not shy of using weak or even fake hadiths prevalent after Muhammad's death to further sectarian and political ends, Its authenticity is equivalent to the end result of a game of telephone over several cities for centuries.
2) I am genuinely confused why he included sucking a finger after eating food to be a "disgusting" act worthy of shame by Muhammad, it doesnt fit and just seems like a personal pet peeve of the guy, especially considering its what the majority of people do after eating chips or practically almost any food that is eaten by hand before we wipe or wash it.
The hadith itself taken out of context. If you look at it culturally, it says the prophet told his followers to lick their fingers after eating, or have someone else lick it before wiping and washing the finger (meaning, such as a husband or wife, not just some rando) because Muhammad's words in this hadith are not You-Must-Do-It otherwise you have sinned type of thing, its just a suggestion of manners. The verse doesnt actually mandate strangers sucking eachother's fingers, that is a misconception.
3) This is another case of a bad interpretation of a verse, In this case, it was the practice of Arabs who lived in the dry desert climate to moisten the lips and mouth of a child who was suffering from thirst. If a child had parched lips or dry mouth and water was scarce, they could be relieved by sharing saliva. This was something practical and necessary in the tough climate in which they lived. Muhammad also had to do this to his two young grandsons because they were suffering from thirst and there was no water available.(Source: Al-Mu’jam al-Kabīr 2588 and Kitāb al-Shifā 1/326) So no, it does not mean anything like said in the video.
4) I have to question some claims he made in this part, disregarding how you personally feel about Muhammad having multiple wives, the guy in the video mentions the hot Arabian temperatures in the day as a reason why Muhammad was disgusting for only taking one bath after intercourse...but the deed was done at night, and Muhammad bathed once at night to cleanse himself, it never mentions anything about Muhammad's daily bathing routine? The guy was misconstruing things irrelevant to the passage and making claims out of nothing.
This specific hadith referenced in the video only happened as a one time occurence as here is another hadith which shows the regular routine of the Prophet which is spending every night with 1 wife(Sunan Abi Dawud 2135). The particular time where the Prophet had intimacy with all his wives in 1 night only happened once after the Farewell Hajj Pilgrimage he did, which means this is not a regular occurence.
5) These hadiths NEVER flippin mentions that Muhammad clothes were always covered in semen, sigh, the guy deliberately made baseless assumptions and interpretations after seeing a few lines. What these hadiths were about is simple, a follower asked what to do if clothes are covered in seminal fluids, and one of Muhammad wives tells them the method.
If you think about it for more than two seconds, scraping and washing it off is a perfectly reasonable thing to do, the 'water spots' mentioned are literally water that has not dried after washing the clothes and not leftover semen like he seems to think it is. The reason Muhammad didn't wash his clothes is because his wives did it for him like other spouses at Arab did at the time, did the guy forget it's not the 21st century yet when these were written?