gonetz (the person who made the original Glide64 plugins) is working on a more modern plugin which he plans on being the most advanced plugin available. Right now he has an Indiegogo campaign to collect fund which will allow him to do rapid development on the plugin and hopefully have it released for January 2015. The campaign can be found
here. You can also take a look at
his blog for details on N64 video emulation.
I am trying to get in touch with the developer in hopes of integrating this plugin with Bizhawk as soon as it is released. The samples he provides look fantastic, so I'd really like to see this plugin used in the TAS community. Unfortunately from what I can tell he doesn't want to release the plugin or the source code until he is comfortable with it's development, and without the money to work on it it seems like that might not be for a long time. If you can I urge you to donate before the campaign ends on September 5th.