Please do not be under the illusion or the wrong impression that this is one of those small matters of disagreement among the scholars because it is not. This is huge, with very serious implications. What is being presented here is the very antithesis of what Islam stands for, and what Islam came to abolish, and to establish.
Sure, Muslims sometimes disagree on certain matters where there are two valid opinions, or one of the opinions is stronger, and you agree to disagree or you follow one view while respecting the other person's right to their view and recognising that they're not wrong in what they do.
Du'a is an act of worship, and therefore to make du'a to anyone in addition to Allah, to a dead person, to use them as an intermediary, is a manifestation of associating others in the worship that belongs to Allah exclusively. Shirk is the biggest sin in Islam.
As per brother Ramadan's request, no proof as been presented that what brothers and sisters have said here in this thread, with evidence from Qur'an and ahadeeth, is wrong. The video showed no Qur'anic ayaat or hadeeth where it says one should or can make du'a to the dead.
I agree with Sheikh Hamza that we should vie with each other for virtue. May Allah give us all the tawfeeq to do that, ameen.
To conclude, Allah is my witness that I and the brothers and sisters here tried to convey the message and clarify misconceptions, and if I went about it the wrong way or erred, I hope Allah will forgive me.