Film one lift.
Nobody else has to watch. Once a week, the same lift, from the same spot. You are building a baseline of your own shape. You are not hunting defects.
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01
Same lift
Pick one compound you already do. Squat, hinge, press, or pull. Keep it for four weeks before you swap.
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02
Same camera, same height
Phone on a bag or a rack, landscape or portrait, as long as it is the same every time. Side-on. What has to match week to week is the frame, not the lighting.
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03
Once a week, not every set
One working set is enough. Date the file. Next week you stand in the same place and film the same thing.
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04
You against you
Play last week next to this week. Say out loud what held. Do not scroll other people's highlights. A coach, if you later have one, watches these same files.
This is not an app correcting your form. It is a record you own. Technique First is the closest style, but the other seven do not stop applying.