Answer: They used colors and patterns to convey the regional identity of the wearer.
Explanation:
Inca textiles were arguably the best textiles in Mesoamerica before the arrival of the Spanish. They were so valuable to the Inca that the best ones were worth more than gold and silver to the point where the Inca used these textiles to welcome the Spanish and when relationships soured, they burnt most of them so that the Spanish would not acquire them.
These textiles had many different colors and patterns and these were meant to show the regional identity of the wearer as well as their wealth and status in society. For instance, a foreigner in the capital city was only permitted to wear black textiles and Nobility were able to wear garments that had additional decorations such as rare bird feathers.
We group them by their style and by their time period
Video is a newer version of film, whilst videos may be digital which makes them easily accesible. Film includes such things as film reels which might get damaged and like with vhs tapes, you must rewind them manually if you wish to watch it again. So basically, videos are more secure while films might be slightly tedious.