Hello, based on your description, this handwritten certificate and recorded will are invalid.

Record a will. That is, the testator determines the contents of his will through audio or video recording. A recorded will is the same as a written will. It requires the presence of more than two witnesses, and the witnessing situation must be recorded or videotaped. After completion, the audio and video content should be sealed and sealed with the signatures of the witnesses and testator.

Article 17 of the Marriage Law stipulates that a will established in the form of a recording must be witnessed by more than two witnesses.

Article 18 of the Marriage Law stipulates that the following persons cannot serve as witnesses of a will: (1) persons without capacity or persons with limited capacity; (2) heirs and legatees; (3) persons with heirs and legacies People have a stake.

So, if you fight for your rights, you can still sue.