The wiki page on the ascent is kind of hilarious with how it makes the scepticism seem completely racially motivated:

• Subsequent ascents corroborated the expedition report's descriptions of the Third Step and the terrain near the summit, and demonstrated the viability of ascending without oxygen
• Lawrence Wager concluded that the 25 May photos were taken above the Second Step by comparing them to photos from the 1933 and 1953 expeditions
• contemporary written accounts from the 1960 expedition "incorporate descriptions of topographical details of the final pyramid that could only have been obtained if the party had indeed reached the top."
• A study of the video determined that it had been taken above 8,700 m, demonstrating that the party had overcome the crux of the way to the summit

vs

"there was a cliff they said was 3m tall but actually it's 8m tall"