ANSWERS: 2
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On my computer, I have Jihosoft Video Overlay Software, which is also listed in the post you mentioned in your question. Well, the software work not bad. It is easy to use. Sure it can meet the basic needs. https://bit.ly/2CyC2Zw
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Adobe After Effects. Generally, you have to use a green screen or make a mask of the part of the video that you wish to overlay on top of the background plate.
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