There was this little passerine(?) hopping around the Gigantopithecus at the river. I went through every bird in Thailand (I believe where this would have been filmed) and couldn't find a match, and since it reacts to the giganto I'm thinking it may be CG.

I did my own bout of PhP birding and came to the same conclusions on everyone that you shared. I believe this is a flock of primarily Madagascar Cuckooshrike, there may be a couple Vanga in there as well but it's too blurry and quick to tell for sure.