I did not look at the video but sounds like you have a single support structure that keeps falling over. no idea what slicer you are using, this info is for Simplified 3D V 4.01
On the support tab, use 4 or 5 support base layers, make sure lower vertical separation layers set to 0, add additional support infill angles, manually add additional supports, Utilize a brim (6 skit outlines, .04mm offset)