Luckily, I could have a chance to participate in a discussion, when Esteve and prof. Dongheui Lee@TUWien prepared to submit their result to EGO4D LTA Challenge propsed by Facebook AI.
And they finally got the best result in this challenge :)!! More information can be found in below link.
Congratulation to Esteve and prof. Dongheui Lee @TUWien!