The hinge or retention arrangement may not be correctly engaged, and the door should not be forced. A change after refitting deserves specific attention.
What the observation means
A heavy door can move unexpectedly if its mechanism is not seated as intended. Another model's removal video may show a different latch design. Do not use repeated opening and slamming as a test.
A useful next step
Keep the oven cool and unused if secure fitting is uncertain. Tell the person assessing it that the door was recently removed and describe the changed movement. Retain the manual and any loose parts rather than attempting further adjustment without the correct procedure.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.