The video includes an introduction to geriatric frailty (3 minutes) and ACP (5 minutes). ACP includes three levels of medical care: life-prolonging care, limited care, and comfort care.

Comprehensibility was measured using a knowledge questionnaire and the Patient Education Materials Assessment Tool for Audiovisual Materials (PEMAT-A/V).The knowledge questionnaire consists of 7 questions, each with 10 correct answer choices, scored at 10 points per correct choice, for a total of 100 points. Higher scores indicate greater accuracy in knowledge and better comprehension. The PEMAT-A/V evaluates comprehension through 13 items and feasibility through 4 items. Responses are scored as Agree = 1 point, Disagree = 0 points, and Not Applicable (N/A) excluded from the total score calculation. The final score is calculated as Total Points/Total Possible Points x 100. Higher scores indicate that the material is easier to comprehend or more feasibility.

Measurement timing: elder patients and their family members will complete the knowledge questionnaire before viewing the video. They will also complete the PEMAT A/V within one hour after viewing the materials.

Usability was evaluated through a feedback questionnaire. The feedback questionnaire consists of 6 items. Except for the final open-ended question, the remaining items are scored using a 4-point Likert scale (0-3). Lower scores indicate higher usability.

Measurement timing: elder patients and their family members will complete the feedback questionnaire within one hour after viewing the materials.

Feasibility were evaluated through the PEMAT-A/V. The PEMAT-A/V evaluates comprehension through 13 items and feasibility through 4 items. Responses are scored as Agree = 1 point, Disagree = 0 points, and Not Applicable (N/A) excluded from the total score calculation. The final score is calculated as Total Points/Total Possible Points x 100. Higher scores indicate that the material is easier to comprehend or more feasibility.

Measurement timing: elder patients and Healthcare professionals (Have experience in advance care planning) will complete the PEMAT A/V within one hour after viewing the materials.