DRM query on fallback

Hi, We are evaluating EvoStream for streaming HLS and DASH videos. we need DRM in our streamings and able to do in both HLS and DASH. But some android devices not supported either DASH or HLS. we are playing our videos using BitDash player. HLS and DASH are breaking frequently in android broswers (Some playing audio or video only).. My query is if both HLS and DASH fail in any android browser and we fallback to mannual streaming directly from file or using rtmp streaming eg. PathtoFile/myFile.mp4. Here how can we apply DRM (AES Encryption) and make sure that video can not be downloaded by end user.