If you need to create animated videos for marketing, Explaindio is a tool with plenty of options that will get you to the finish line. While it has a few shortcomings in the audio and 3D departments, the program is fairly well-made in terms of the timeline, canvas, and editing features. It may take some time to learn, but you'll have a high-quality video for a cheap price by the end.
Dark realism featured in Masami Kurumada's famous manga Saint Seiya. The anime adapted two of the three arcs in Kurumada's manga—the project to adapt the third arc to the anime never started. As Kurumada had completed his manga in 1991, its third act was finally adapted to anime, releasing the episodes as OVAs, starting in 2003 and finishing in 2008, at last adapting Kurumada's manga completely to anime.
There is a excellent video training (about 2 hours) how you can use Explaindio 4.0 for the best results. This training isn’t a part of the program or an upsell. It’s a stand-alone product made by Scott Hamlin and called Explaindio For Professionals ($27.00). I can highly recommend this quality training. It’ll save you time and many and fore all give you great ideas and examples how to use the software without any prior experience.