360 A great portion of dog training is getting to know your dog and increasing the depth of interaction.
From watching the videos your dog doesn’t seem to be particularly food motivated. A suggestion for making training more enjoyable and increase enthusiasm in your dog is implementing the premack principle.
https://dogtraining.world/phase-1-sit-premack-principle/
In the early stages of training shorten the periods between sessions. 2-3 minutes of obedience and 1-2 minutes of something he enjoys.
It doesn’t have to be anything special,
It could be as simple as one of mine who loved to run. After discovering it I would have him heel, give a down command and I would keep walking for a 100 yards and call him to me.
The run was his reward. That is the lesser desired activity of obedience led to the reward of run afterwards and increased his enthusiasm for obedience training. At other times it may be a game of tug or a bit of “roughhousing.”
An example from a training session with one of mine.
https://dogtraining.world/journal/journal-ace-19429-1196-14/