Here's the full set of 22 GIFs, in the order that I found them, including the two above. The first one will autoplay. Click the others to play.
<video controls autoplay loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing1-1.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing2-1.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing3.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing4.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing5.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing6.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing7.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing8.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing9.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing10.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing11.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing12.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing13.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing14.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing15.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing16.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing17.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing18.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing19.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing20.mp4" type="video/mp4">
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</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing21.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
<video controls loop>
<source src="https://s3-us-west-1.amazonaws.com/hmt-forum/china_drum_toothing22.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>