Play mp4 video on android and IOS from local folder?

HI!
I resolved the issue, but fails when the video is heavy (up to 5MB).

this._file.checkFile(this._file.dataDirectory, "file.mp4").then((correct : boolean) => {
                            if(correct){
                                this._file.readAsDataURL(this._file.dataDirectory,  "file.mp4").then((base64) => {
                                    this.source = this._sanitizer.bypassSecurityTrustUrl(base64);
                                    this.bo_html5 = true;
                                }).catch((err) => {
                                    console.log("VIDEO :: No se pudo recuperar el video");
                                    console.log(err);
                                });
                            } else {
                                console.log("VIDEO :: El video no pudo ser encontrado");
                            }
                        }).catch((err) => {
                            console.log("VIDEO :: Ocurrio un error al verificar si el video existe");
                            console.log(err);
                        });

<video *ngIf="bo_html5  && source!=null" width="{{width}}" height="{{height}}" controls>
        <source [src]="source" type="video/mp4">
    </video>