Was the earthly tabernacle built according to a pattern of something in heaven?
Yes. God instructed Moses to build the earthly tabernacle according to a pattern of the heavenly one. Hebrews 9:11 calls Christ's tabernacle greater and more perfect, not made with hands, unlike Sinai's tabernacle or Solomon's temple. That heavenly tabernacle is God-constructed, not of this building, better rendered creation.
Les explains that God told Moses He would give the instructions to build the tabernacle on earth patterned after one that is in heaven. To show this from Scripture, Les takes us back to Hebrews chapter 9, verse 11, where Paul writes that Christ came as a high priest of good things to come by a greater and more perfect tabernacle, not made with hands. Les emphasizes this is not like the tabernacle in Sinai or Solomon's temple made by men. Instead, it is a tabernacle God has constructed, not made with hands—not of this building, a word that would be better translated creation.