I've setup a new style (Configuration / Content Authoring / Text Formats and Editors) in order to use the Bootstrap Responsive Wrappers module for video embeds.
I can apply the Format to text fields during field creation. But after saving if I edit the field again it has reverted back to "basic HTML".
Are there any alternative Modules for successfully allowing fields to responsively embed videos from Youtube within Drupal 8 using Bootstrap 4 based theme?
UPDATE: I Found an alternate solution: I've started to using this module instead: https://www.drupal.org/project/video_embed_field
The Video Embed Field module is working responsively now and required little effort to set it up.