Based on online research, VidDay appears to be a legitimate service. It has received a 4.8/5 rating from over 334 people on Trustpilot and a 4.0/5 overall score based on 56 VidDay reviews. The reviews highlight the company's excellent customer service and easy-to-use platform. However, some users have expressed dissatisfaction with the video rendering time and the cost of processing videos. As with any online service, experiences may vary, so it's recommended to do thorough research before using the service.