dontconvert2islam is anxious; what portion of mankind goes to hell?

In answer to the video "The Chances of Islamic Salvation?"

As to punishment in the hereafter. Neither the Quran nor the prophetic sayings say that most people will be made to enter hell. Before getting to the 99% hadith which that youtuber grossly misrepresents, i will first start with a Quran passage most often used by opponents of Islam to convey the same idea of indiscriminate punishment in hell. 

It is a passage specifically addressing the misleaders and those that blindly follow them. It starts in sura maryam 19:68 where the blind followers and their leaders are gathered. Only those arriving to the resurrection burdened with disbelief and so many sins they havent repented for, they will be the only ones gathered for a terrible task 25:26,54:6 as opposed to the righteous believers who in their lifetime stood in awe of such day

76:7-11"Therefore Allah will guard them from the evil of that day and cause them to meet with ease and happiness".

Consequently they, whether male or female, will never be abased or disgraced between their earthly death and final entry to heaven. Instead, once resurrected they will be shining with a light emanating from them and guiding them on the path to paradise while the rest of the world is plunged in darkness 3:194-5,57:12,66:8. They will in addition be receiving Allah's love 19:96, His individual care 76:11, they will be safe from harm 41:40 and raised in a happy state 56:8,76:11,88:8. Their faces will be bright 3:107,75:22 looking forward to Allah's promise 50:32,28:61. They wont have any grief or fear of the supreme awesomeness of that day, as they will be protected from its upheaval and afflictions, welcomed and greeted by the angels before the beginning of their judgement 2:277,16:32,21:103. They will be removed far away from hearing the faintest sound of hell 2:17,26:90,21:98-103. The fire of hell will only be brought before the disbelievers and unrepented sinners 18:99-101, the only ones experiencing this mighty day as a great difficulty 74:8-10.

This group of believers from among the Muslims and the righteous who will be safeguarded from any difficulty on that Day, does not include the criminals among the Muslims themselves whom the Quran says will enter hell and/or experience a difficult judgement. 

Those who rejected or disregarded most or all of the directives of the Quran when it was communicated to them (Muslims and non-Muslims alike) and who transgressed willingly and rebelliously, then despite their good actions, their measurements on the scales of deeds, on the day they are raised for judgement, these measurements will be light

23:102-103"Then as for him whose scales/mawazin are heavy, these are the successful. And as for him whose scales are light, these are they who shall have lost their souls, abiding in hell".

The Quran also clearly says that among the Muslims themselves there are different grades in God's eyes 35:32-5 and although all will eventually enter heaven, this entry will be granted differently from person to person following a personalized appropriate trial, going from short and easy to lengthy and difficult. Some will even have to pass through Hell as long as Allah deems fit before being granted entry in heaven 6:128,11:106-108 and the Quran has mentionned several crimes such as murder, corruption of inheritance, abusing the weak people's wealth or charity etc whose perpetrators will go to hell regardless of their faith. It is in such context that the following prophetic saying is understood

"Gabriel, upon him be peace, came to me with the good news that anyone from my nation who dies without associating partners with Allah will enter Paradise. I said, “Even if he commits adultery and theft?” The Prophet said: Even if he commits adultery and theft".

Elsewhere

"People among those who worshiped Allah alone (ahl al-tawhid) will be punished in the Hellfire until they are coals. Then the mercy of Allah will reach them and they will be taken out and presented at the gates of Paradise. The people of Paradise will pour water over them and they will grow just as the stubble carried by the stream grows, then they will enter Paradise".