<div class="btn btn-info btn-raised">
    Subir Foto
    <input id="custom-input" type="file" (change)="fileChangeListener($event)" accept="video/*">
</div>

<video controls>
    <source src="{{ data.video }}" type="{{ data.type }}">
</video>

private fileChangeListener($event) {
    let fileList: FileList = $event.target.files;
    this.data = {};
    if (fileList.length > 0) {
        let file: File = fileList[0];
        console.log('video seleccionado', file);
        let myReader: FileReader = new FileReader();
        let that = this;
        myReader.onloadend = (loadEvent: any) => {
            console.log('video', myReader.result);
            this.data.video = myReader.result;
            this.data.type = file.type;
        };
        myReader.readAsDataURL(file);
    }
}