I don't think any of the scholars put forward in the video didn't believe the Bible story was scripture. But if one reads closely, there's a lot that isn't said:
(1) It never says Ananias and Sapphira promised to give all their money
(2) You never hear Ananias and Sapphira say anything
(3) There was no Biblical law they broke
Also Peter doesn't always get it right (i.e., cutting of someone's ear).
So I'm not saying which one is the right interpretation, I'm just saying that gaps and ambiguities invite these different interpretations. Which is why as far back as the early Church there have been different views.
The biblical law that was broken is that they lied.
Revelation 21:8 says all liars will have their part in the Lake of Fire.
Christians are no exception.
Granted, more specifically, these two lied to the Holy Spirit.
But their sin was more grave than say just lying to people.
It was lying directly to God.
Also, Peter did not kill them, but it was the Holy Spirit (God who killed them).
That is evident by a normal reading of this in Scripture.
Now, where the interpretation of many comes in is based upon a person’s view of sin and salvation.
Were these true believers or fake ones?
If these were true believers, were they saved?
I believe that the text does not treat these two believers as false believers or false teachers. They appear to be fellow Christians who committed a grievous sin.
Were they saved after they were killed?
I don’t think so because the text says a great fear came upon the church when they heard about it.
The emotion of fear only makes sense if they knew that a similar sin could also cause them to be killed by God, too. For if they were saved, the church would be sad or they would rejoice that they are in the arms of Jesus. If they were false believers, they would either feel the emotion of a sense of justice being done or they would pity them. Fear does not make sense unless they knew they could also lose their salvation by sinning greatly in God’s sight.
Side Note:
Anyways, please take no offense, friend, but I would encourage you to read your Bible more in study. Ask God to help you to understand His Word, and He will help you. Believers need to be strong in His word by studying it with God.