Viewing the Mass on the internet is spiritually beneficial,
it does not satisfy your Sunday obligation. 

The proper way to celebrate Sunday is spoken of at length in the Catechism of the Catholic Church.

2182  Participation in the communal celebration of the Sunday Eucharist is a testimony of belonging and of being faithful to Christ and to his Church. The faithful give witness by this to their communion in faith and charity. Together they testify to God's holiness and their hope of salvation. They strengthen one another under the guidance of the Holy Spirit.

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